Astronomy Dictionary - Discover Definitions in Astronomy Dictionary

Sygyzy from an ever growing glossary of space and astronomy definitions. Find the definitions for Sygyzy and all your space and astronomy related words in this online dictionary - glossary.

B-V color is one of the two color indices in the UBV photometric system. Astronomers measure the amount of light a star gives off in different colors. Hot stars give off more blue light than red; cool stars give off more red light than blue. Colored filters are used to measure different wavelengths of light from stars. The magnitude of the star is measured first through a standardized B-band ("blue") filter.

Created by Edwin P Hubble (1925), Hubble's Law describes a relationship between a galaxy's distance from us and its velocity through space. The farther away a galaxy is from us, the faster it is receding from us. The constant of proportionality is the Hubble constant, Ho, named after Edwin P. Hubble who discovered the relationship. Hubble's Law is interpreted as evidence that the Universe is expanding.

Dwarf Planet - from an ever growing glossary of space and astronomy definitions. Find the definitions for Dwarf Planet and all your space and astronomy related words in this online dictionary - glossary.

Mathematical Astronomy is the science of using mathematical equations to describe the universe or to predict various aspects of the universe. Mathematics is and always has been of central importance to astronomy.

Radio Astronomy - from an ever growing glossary of space and astronomy definitions. Find the definitions for Radio Astronomy and all your space and astronomy related words in this online dictionary - glossary.

astrometry - from an ever growing glossary of space and astronomy definitions. Find the definitions for astrometry and all your space and astronomy related words in this online dictionary - glossary.

A solar system consists of a star & all the objects orbiting it as well as all the material in that system. Our Solar System includes the Sun together with the eight planets & their moons as well as all other celestial bodies that orbit the sun. Besides the sun, 8 planets & their moons, our Solar System contains billions of other objects and extends far beyond the outermost planets. There are several hundred thousand asteroids revolving around the Sun. Most have orbits between Mars and Jupiter.

ASM - from an ever growing glossary of space and astronomy definitions. Find the definitions for ASM and all your space and astronomy related words in this online dictionary - glossary.

BBXRT - from an ever growing glossary of space and astronomy definitions. Find the definitions for BBXRT and all your space and astronomy related words in this online dictionary - glossary.

JHUAPL - from an ever growing glossary of space and astronomy definitions. Find the definitions for JHUAPL and all your space and astronomy related words in this online dictionary - glossary.

SSI - from an ever growing glossary of space and astronomy definitions. Find the definitions for SSI and all your space and astronomy related words in this online dictionary - glossary.

active galactic nuclei (AGN) - from an ever growing glossary of space and astronomy definitions. Find the definitions for active galactic nuclei (AGN) and all your space and astronomy related words in this online dictionary - glossary.

angstrom - from an ever growing glossary of space and astronomy definitions. Find the definitions for angstrom and all your space and astronomy related words in this online dictionary - glossary.

angular momentum - from an ever growing glossary of space and astronomy definitions. Find the definitions for angular momentum and all your space and astronomy related words in this online dictionary - glossary.

a medium-sized rocky object orbiting the Sun; smaller than a planet, larger than a meteoroid. Asteroids show no evidence of an atmosphere or other types of activity associated with comets. Asteroids can be lass that one-mile to almost 600 miles in diameter.

Astronomer - from an ever growing glossary of space and astronomy definitions. Find the definitions for Astronomer and all your space and astronomy related words in this online dictionary - glossary.

astronomy - from an ever growing glossary of space and astronomy definitions. Find the definitions for astronomy and all your space and astronomy related words in this online dictionary - glossary.

astrophysics - from an ever growing glossary of space and astronomy definitions. Find the definitions for astrophysics and all your space and astronomy related words in this online dictionary - glossary.

Axis - from an ever growing glossary of space and astronomy definitions. Find the definitions for Axis and all your space and astronomy related words in this online dictionary - glossary.

Balmer lines (J. Balmer) - from an ever growing glossary of space and astronomy definitions. Find the definitions for Balmer lines (J. Balmer) and all your space and astronomy related words in this online dictionary - glossary.

baryon - from an ever growing glossary of space and astronomy definitions. Find the definitions for baryon and all your space and astronomy related words in this online dictionary - glossary.

binary stars - from an ever growing glossary of space and astronomy definitions. Find the definitions for binary stars and all your space and astronomy related words in this online dictionary - glossary.

black dwarf - from an ever growing glossary of space and astronomy definitions. Find the definitions for black dwarf and all your space and astronomy related words in this online dictionary - glossary.

Black Hole - from an ever growing glossary of space and astronomy definitions. Find the definitions for Black Hole and all your space and astronomy related words in this online dictionary - glossary.

black-hole dynamic laws - from an ever growing glossary of space and astronomy definitions. Find the definitions for black-hole dynamic laws and all your space and astronomy related words in this online dictionary - glossary.

blackbody radiation - from an ever growing glossary of space and astronomy definitions. Find the definitions for blackbody radiation and all your space and astronomy related words in this online dictionary - glossary.

blackbody temperature - from an ever growing glossary of space and astronomy definitions. Find the definitions for blackbody temperature and all your space and astronomy related words in this online dictionary - glossary.

blueshift - from an ever growing glossary of space and astronomy definitions. Find the definitions for blueshift and all your space and astronomy related words in this online dictionary - glossary.

Boltzmann constant; k (L. Boltzmann) - from an ever growing glossary of space and astronomy definitions. Find the definitions for Boltzmann constant; k (L. Boltzmann) and all your space and astronomy related words in this online dictionary - glossary.

Brahe, Tycho (1546 - 1601) - from an ever growing glossary of space and astronomy definitions. Find the definitions for Brahe, Tycho (1546 - 1601) and all your space and astronomy related words in this online dictionary - glossary.

bremsstrahlung - from an ever growing glossary of space and astronomy definitions. Find the definitions for bremsstrahlung and all your space and astronomy related words in this online dictionary - glossary.

caldera - from an ever growing glossary of space and astronomy definitions. Find the definitions for caldera and all your space and astronomy related words in this online dictionary - glossary.

calibration - from an ever growing glossary of space and astronomy definitions. Find the definitions for calibration and all your space and astronomy related words in this online dictionary - glossary.

canyon - from an ever growing glossary of space and astronomy definitions. Find the definitions for canyon and all your space and astronomy related words in this online dictionary - glossary.

carbon - from an ever growing glossary of space and astronomy definitions. Find the definitions for carbon and all your space and astronomy related words in this online dictionary - glossary.

carbonate - from an ever growing glossary of space and astronomy definitions. Find the definitions for carbonate and all your space and astronomy related words in this online dictionary - glossary.

carbondioxide - from an ever growing glossary of space and astronomy definitions. Find the definitions for carbondioxide and all your space and astronomy related words in this online dictionary - glossary.

cartographic - from an ever growing glossary of space and astronomy definitions. Find the definitions for cartographic and all your space and astronomy related words in this online dictionary - glossary.

cartography - from an ever growing glossary of space and astronomy definitions. Find the definitions for cartography and all your space and astronomy related words in this online dictionary - glossary.

Cataclysmic Variable (CV) - from an ever growing glossary of space and astronomy definitions. Find the definitions for Cataclysmic Variable (CV) and all your space and astronomy related words in this online dictionary - glossary.

catena - from an ever growing glossary of space and astronomy definitions. Find the definitions for catena and all your space and astronomy related words in this online dictionary - glossary.

cavus - from an ever growing glossary of space and astronomy definitions. Find the definitions for cavus and all your space and astronomy related words in this online dictionary - glossary.

Cepheid Variable - from an ever growing glossary of space and astronomy definitions. Find the definitions for Cepheid Variable and all your space and astronomy related words in this online dictionary - glossary.

Chandra X-ray Observatory (CXO) - from an ever growing glossary of space and astronomy definitions. Find the definitions for Chandra X-ray Observatory (CXO) and all your space and astronomy related words in this online dictionary - glossary.

Chandrasekhar limit - from an ever growing glossary of space and astronomy definitions. Find the definitions for Chandrasekhar limit and all your space and astronomy related words in this online dictionary - glossary.

Chandrasekhar, S. (1910 - 1995) - from an ever growing glossary of space and astronomy definitions. Find the definitions for Chandrasekhar, S. (1910 - 1995) and all your space and astronomy related words in this online dictionary - glossary.

chaos - from an ever growing glossary of space and astronomy definitions. Find the definitions for chaos and all your space and astronomy related words in this online dictionary - glossary.

charge-coupled device(CCD) - from an ever growing glossary of space and astronomy definitions. Find the definitions for charge-coupled device(CCD) and all your space and astronomy related words in this online dictionary - glossary.

chasma - from an ever growing glossary of space and astronomy definitions. Find the definitions for chasma and all your space and astronomy related words in this online dictionary - glossary.

Chicxulub crater - from an ever growing glossary of space and astronomy definitions. Find the definitions for Chicxulub crater and all your space and astronomy related words in this online dictionary - glossary.

chromophores - from an ever growing glossary of space and astronomy definitions. Find the definitions for chromophores and all your space and astronomy related words in this online dictionary - glossary.

chromosphere - from an ever growing glossary of space and astronomy definitions. Find the definitions for chromosphere and all your space and astronomy related words in this online dictionary - glossary.

cluster of galaxies - from an ever growing glossary of space and astronomy definitions. Find the definitions for cluster of galaxies and all your space and astronomy related words in this online dictionary - glossary.

collecting area - from an ever growing glossary of space and astronomy definitions. Find the definitions for collecting area and all your space and astronomy related words in this online dictionary - glossary.

colles - from an ever growing glossary of space and astronomy definitions. Find the definitions for colles and all your space and astronomy related words in this online dictionary - glossary.

coma - from an ever growing glossary of space and astronomy definitions. Find the definitions for coma and all your space and astronomy related words in this online dictionary - glossary.

comet - from an ever growing glossary of space and astronomy definitions. Find the definitions for comet and all your space and astronomy related words in this online dictionary - glossary.

compression - from an ever growing glossary of space and astronomy definitions. Find the definitions for compression and all your space and astronomy related words in this online dictionary - glossary.

Compton effect (A.H. Compton; 1923) - from an ever growing glossary of space and astronomy definitions. Find the definitions for Compton effect (A.H. Compton; 1923) and all your space and astronomy related words in this online dictionary - glossary.

conjunction - from an ever growing glossary of space and astronomy definitions. Find the definitions for conjunction and all your space and astronomy related words in this online dictionary - glossary.

constellation - from an ever growing glossary of space and astronomy definitions. Find the definitions for constellation and all your space and astronomy related words in this online dictionary - glossary.

convection - from an ever growing glossary of space and astronomy definitions. Find the definitions for convection and all your space and astronomy related words in this online dictionary - glossary.

Copernicus - from an ever growing glossary of space and astronomy definitions. Find the definitions for Copernicus and all your space and astronomy related words in this online dictionary - glossary.

Copernicus, Nicolaus - from an ever growing glossary of space and astronomy definitions. Find the definitions for Copernicus, Nicolaus and all your space and astronomy related words in this online dictionary - glossary.

corona - from an ever growing glossary of space and astronomy definitions. Find the definitions for corona and all your space and astronomy related words in this online dictionary - glossary.

coronagraph - from an ever growing glossary of space and astronomy definitions. Find the definitions for coronagraph and all your space and astronomy related words in this online dictionary - glossary.

cosmic ray - from an ever growing glossary of space and astronomy definitions. Find the definitions for cosmic ray and all your space and astronomy related words in this online dictionary - glossary.

cosmicbackrad - from an ever growing glossary of space and astronomy definitions. Find the definitions for cosmicbackrad and all your space and astronomy related words in this online dictionary - glossary.

cosmological constant; Lambda - from an ever growing glossary of space and astronomy definitions. Find the definitions for cosmological constant; Lambda and all your space and astronomy related words in this online dictionary - glossary.

cosmological distance - from an ever growing glossary of space and astronomy definitions. Find the definitions for cosmological distance and all your space and astronomy related words in this online dictionary - glossary.

cosmological redshift - from an ever growing glossary of space and astronomy definitions. Find the definitions for cosmological redshift and all your space and astronomy related words in this online dictionary - glossary.

cosmology - from an ever growing glossary of space and astronomy definitions. Find the definitions for cosmology and all your space and astronomy related words in this online dictionary - glossary.

crater - from an ever growing glossary of space and astronomy definitions. Find the definitions for crater and all your space and astronomy related words in this online dictionary - glossary.

crater density - from an ever growing glossary of space and astronomy definitions. Find the definitions for crater density and all your space and astronomy related words in this online dictionary - glossary.

crater size distribution - from an ever growing glossary of space and astronomy definitions. Find the definitions for crater size distribution and all your space and astronomy related words in this online dictionary - glossary.

cross-cut - from an ever growing glossary of space and astronomy definitions. Find the definitions for cross-cut and all your space and astronomy related words in this online dictionary - glossary.

crust - from an ever growing glossary of space and astronomy definitions. Find the definitions for crust and all your space and astronomy related words in this online dictionary - glossary.

Dark Matter - from an ever growing glossary of space and astronomy definitions. Find the definitions for Dark Matter and all your space and astronomy related words in this online dictionary - glossary.

dark terrain - from an ever growing glossary of space and astronomy definitions. Find the definitions for dark terrain and all your space and astronomy related words in this online dictionary - glossary.

de Broglie wavelength (L. de Broglie; 1924) - from an ever growing glossary of space and astronomy definitions. Find the definitions for de Broglie wavelength (L. de Broglie; 1924) and all your space and astronomy related words in this online dictionary - glossary.

declination - from an ever growing glossary of space and astronomy definitions. Find the definitions for declination and all your space and astronomy related words in this online dictionary - glossary.

deconvolution - from an ever growing glossary of space and astronomy definitions. Find the definitions for deconvolution and all your space and astronomy related words in this online dictionary - glossary.

degree - from an ever growing glossary of space and astronomy definitions. Find the definitions for degree and all your space and astronomy related words in this online dictionary - glossary.

density - from an ever growing glossary of space and astronomy definitions. Find the definitions for density and all your space and astronomy related words in this online dictionary - glossary.

Dewar - from an ever growing glossary of space and astronomy definitions. Find the definitions for Dewar and all your space and astronomy related words in this online dictionary - glossary.

differentiation - from an ever growing glossary of space and astronomy definitions. Find the definitions for differentiation and all your space and astronomy related words in this online dictionary - glossary.

disk - from an ever growing glossary of space and astronomy definitions. Find the definitions for disk and all your space and astronomy related words in this online dictionary - glossary.

Doppler Effect - from an ever growing glossary of space and astronomy definitions. Find the definitions for Doppler Effect and all your space and astronomy related words in this online dictionary - glossary.

dorsum - from an ever growing glossary of space and astronomy definitions. Find the definitions for dorsum and all your space and astronomy related words in this online dictionary - glossary.

dust - from an ever growing glossary of space and astronomy definitions. Find the definitions for dust and all your space and astronomy related words in this online dictionary - glossary.

Earth - from an ever growing glossary of space and astronomy definitions. Find the definitions for Earth and all your space and astronomy related words in this online dictionary - glossary.

eccentric - from an ever growing glossary of space and astronomy definitions. Find the definitions for eccentric and all your space and astronomy related words in this online dictionary - glossary.

eccentricity - from an ever growing glossary of space and astronomy definitions. Find the definitions for eccentricity and all your space and astronomy related words in this online dictionary - glossary.

eclipse - from an ever growing glossary of space and astronomy definitions. Find the definitions for eclipse and all your space and astronomy related words in this online dictionary - glossary.

ecliptic - from an ever growing glossary of space and astronomy definitions. Find the definitions for ecliptic and all your space and astronomy related words in this online dictionary - glossary.

Eddington limit (Sir A. Eddington) - from an ever growing glossary of space and astronomy definitions. Find the definitions for Eddington limit (Sir A. Eddington) and all your space and astronomy related words in this online dictionary - glossary.

effusive eruption - from an ever growing glossary of space and astronomy definitions. Find the definitions for effusive eruption and all your space and astronomy related words in this online dictionary - glossary.

Einstein Observatory, - from an ever growing glossary of space and astronomy definitions. Find the definitions for Einstein Observatory, and all your space and astronomy related words in this online dictionary - glossary.

Einstein, Albert (1879 - 1955) - from an ever growing glossary of space and astronomy definitions. Find the definitions for Einstein, Albert (1879 - 1955) and all your space and astronomy related words in this online dictionary - glossary.

ejecta - from an ever growing glossary of space and astronomy definitions. Find the definitions for ejecta and all your space and astronomy related words in this online dictionary - glossary.

electromagnetic spectrum - from an ever growing glossary of space and astronomy definitions. Find the definitions for electromagnetic spectrum and all your space and astronomy related words in this online dictionary - glossary.

electromagnetic waves (radiation) - from an ever growing glossary of space and astronomy definitions. Find the definitions for electromagnetic waves (radiation) and all your space and astronomy related words in this online dictionary - glossary.

electron volt - from an ever growing glossary of space and astronomy definitions. Find the definitions for electron volt and all your space and astronomy related words in this online dictionary - glossary.

elements - from an ever growing glossary of space and astronomy definitions. Find the definitions for elements and all your space and astronomy related words in this online dictionary - glossary.

ellipse - from an ever growing glossary of space and astronomy definitions. Find the definitions for ellipse and all your space and astronomy related words in this online dictionary - glossary.

elliptical - from an ever growing glossary of space and astronomy definitions. Find the definitions for elliptical and all your space and astronomy related words in this online dictionary - glossary.

erg/sec - from an ever growing glossary of space and astronomy definitions. Find the definitions for erg/sec and all your space and astronomy related words in this online dictionary - glossary.

erosion - from an ever growing glossary of space and astronomy definitions. Find the definitions for erosion and all your space and astronomy related words in this online dictionary - glossary.

event horizon - from an ever growing glossary of space and astronomy definitions. Find the definitions for event horizon and all your space and astronomy related words in this online dictionary - glossary.

evolution - from an ever growing glossary of space and astronomy definitions. Find the definitions for evolution and all your space and astronomy related words in this online dictionary - glossary.

evolved star - from an ever growing glossary of space and astronomy definitions. Find the definitions for evolved star and all your space and astronomy related words in this online dictionary - glossary.

explosive eruption - from an ever growing glossary of space and astronomy definitions. Find the definitions for explosive eruption and all your space and astronomy related words in this online dictionary - glossary.

exponential notation - from an ever growing glossary of space and astronomy definitions. Find the definitions for exponential notation and all your space and astronomy related words in this online dictionary - glossary.

extinction - from an ever growing glossary of space and astronomy definitions. Find the definitions for extinction and all your space and astronomy related words in this online dictionary - glossary.

extrasolar planet - from an ever growing glossary of space and astronomy definitions. Find the definitions for extrasolar planet and all your space and astronomy related words in this online dictionary - glossary.

facula - from an ever growing glossary of space and astronomy definitions. Find the definitions for facula and all your space and astronomy related words in this online dictionary - glossary.

Fast Fourier Transformation (FFT) - from an ever growing glossary of space and astronomy definitions. Find the definitions for Fast Fourier Transformation (FFT) and all your space and astronomy related words in this online dictionary - glossary.

filament - from an ever growing glossary of space and astronomy definitions. Find the definitions for filament and all your space and astronomy related words in this online dictionary - glossary.

fireball - from an ever growing glossary of space and astronomy definitions. Find the definitions for fireball and all your space and astronomy related words in this online dictionary - glossary.

fissure - from an ever growing glossary of space and astronomy definitions. Find the definitions for fissure and all your space and astronomy related words in this online dictionary - glossary.

fluctus - from an ever growing glossary of space and astronomy definitions. Find the definitions for fluctus and all your space and astronomy related words in this online dictionary - glossary.

flux - from an ever growing glossary of space and astronomy definitions. Find the definitions for flux and all your space and astronomy related words in this online dictionary - glossary.

fossa - from an ever growing glossary of space and astronomy definitions. Find the definitions for fossa and all your space and astronomy related words in this online dictionary - glossary.

fracture - from an ever growing glossary of space and astronomy definitions. Find the definitions for fracture and all your space and astronomy related words in this online dictionary - glossary.

frequency - from an ever growing glossary of space and astronomy definitions. Find the definitions for frequency and all your space and astronomy related words in this online dictionary - glossary.

friction - from an ever growing glossary of space and astronomy definitions. Find the definitions for friction and all your space and astronomy related words in this online dictionary - glossary.

fusion - from an ever growing glossary of space and astronomy definitions. Find the definitions for fusion and all your space and astronomy related words in this online dictionary - glossary.

galactic halo - from an ever growing glossary of space and astronomy definitions. Find the definitions for galactic halo and all your space and astronomy related words in this online dictionary - glossary.

galaxy - from an ever growing glossary of space and astronomy definitions. Find the definitions for galaxy and all your space and astronomy related words in this online dictionary - glossary.

Galilean Moons - from an ever growing glossary of space and astronomy definitions. Find the definitions for Galilean Moons and all your space and astronomy related words in this online dictionary - glossary.

Galilei, Galileo (1564 - 1642) - from an ever growing glossary of space and astronomy definitions. Find the definitions for Galilei, Galileo (1564 - 1642) and all your space and astronomy related words in this online dictionary - glossary.

gamma ray - from an ever growing glossary of space and astronomy definitions. Find the definitions for gamma ray and all your space and astronomy related words in this online dictionary - glossary.

Gamma-Ray Burst (GRB) - from an ever growing glossary of space and astronomy definitions. Find the definitions for Gamma-Ray Burst (GRB) and all your space and astronomy related words in this online dictionary - glossary.

gas - from an ever growing glossary of space and astronomy definitions. Find the definitions for gas and all your space and astronomy related words in this online dictionary - glossary.

gasgiants - from an ever growing glossary of space and astronomy definitions. Find the definitions for gasgiants and all your space and astronomy related words in this online dictionary - glossary.

generalrelativity - from an ever growing glossary of space and astronomy definitions. Find the definitions for generalrelativity and all your space and astronomy related words in this online dictionary - glossary.

geodetic control network - from an ever growing glossary of space and astronomy definitions. Find the definitions for geodetic control network and all your space and astronomy related words in this online dictionary - glossary.

geologic activity - from an ever growing glossary of space and astronomy definitions. Find the definitions for geologic activity and all your space and astronomy related words in this online dictionary - glossary.

geologic time - from an ever growing glossary of space and astronomy definitions. Find the definitions for geologic time and all your space and astronomy related words in this online dictionary - glossary.

geologic unit - from an ever growing glossary of space and astronomy definitions. Find the definitions for geologic unit and all your space and astronomy related words in this online dictionary - glossary.

geosynchronous orbit - from an ever growing glossary of space and astronomy definitions. Find the definitions for geosynchronous orbit and all your space and astronomy related words in this online dictionary - glossary.

Giant Molecular Cloud (GMC) - from an ever growing glossary of space and astronomy definitions. Find the definitions for Giant Molecular Cloud (GMC) and all your space and astronomy related words in this online dictionary - glossary.

globular cluster - from an ever growing glossary of space and astronomy definitions. Find the definitions for globular cluster and all your space and astronomy related words in this online dictionary - glossary.

gravitational collapse - from an ever growing glossary of space and astronomy definitions. Find the definitions for gravitational collapse and all your space and astronomy related words in this online dictionary - glossary.

Definition: Gravitational Pull; The attraction that one object has for another object due to the invisible force of gravity. The mass of an object affects its gravitational pull. The gravitational pull of the Sun keeps the planets in orbit around it.

gravitational waves - from an ever growing glossary of space and astronomy definitions. Find the definitions for gravitational waves and all your space and astronomy related words in this online dictionary - glossary.

gravitationally bound - from an ever growing glossary of space and astronomy definitions. Find the definitions for gravitationally bound and all your space and astronomy related words in this online dictionary - glossary.

gravity - from an ever growing glossary of space and astronomy definitions. Find the definitions for gravity and all your space and astronomy related words in this online dictionary - glossary.

gravity gradient - from an ever growing glossary of space and astronomy definitions. Find the definitions for gravity gradient and all your space and astronomy related words in this online dictionary - glossary.

greatcircle - from an ever growing glossary of space and astronomy definitions. Find the definitions for greatcircle and all your space and astronomy related words in this online dictionary - glossary.

greenhouse effect - from an ever growing glossary of space and astronomy definitions. Find the definitions for greenhouse effect and all your space and astronomy related words in this online dictionary - glossary.

ground truth - from an ever growing glossary of space and astronomy definitions. Find the definitions for ground truth and all your space and astronomy related words in this online dictionary - glossary.

guest star - from an ever growing glossary of space and astronomy definitions. Find the definitions for guest star and all your space and astronomy related words in this online dictionary - glossary.

habitable zone - from an ever growing glossary of space and astronomy definitions. Find the definitions for habitable zone and all your space and astronomy related words in this online dictionary - glossary.

Hawking radiation (S.W. Hawking; 1973) - from an ever growing glossary of space and astronomy definitions. Find the definitions for Hawking radiation (S.W. Hawking; 1973) and all your space and astronomy related words in this online dictionary - glossary.

Hawking temperature - from an ever growing glossary of space and astronomy definitions. Find the definitions for Hawking temperature and all your space and astronomy related words in this online dictionary - glossary.

heliocentric - from an ever growing glossary of space and astronomy definitions. Find the definitions for heliocentric and all your space and astronomy related words in this online dictionary - glossary.

heliopause - from an ever growing glossary of space and astronomy definitions. Find the definitions for heliopause and all your space and astronomy related words in this online dictionary - glossary.

heliosphere - from an ever growing glossary of space and astronomy definitions. Find the definitions for heliosphere and all your space and astronomy related words in this online dictionary - glossary.

helium - from an ever growing glossary of space and astronomy definitions. Find the definitions for helium and all your space and astronomy related words in this online dictionary - glossary.

Herschel, Sir William (1738 - 1822) - from an ever growing glossary of space and astronomy definitions. Find the definitions for Herschel, Sir William (1738 - 1822) and all your space and astronomy related words in this online dictionary - glossary.

Hertz, Heinrich (1857 - 1894) - from an ever growing glossary of space and astronomy definitions. Find the definitions for Hertz, Heinrich (1857 - 1894) and all your space and astronomy related words in this online dictionary - glossary.

hertz; Hz (after H. Hertz, 1857 - 1894) - from an ever growing glossary of space and astronomy definitions. Find the definitions for hertz; Hz (after H. Hertz, 1857 - 1894) and all your space and astronomy related words in this online dictionary - glossary.

high sun - from an ever growing glossary of space and astronomy definitions. Find the definitions for high sun and all your space and astronomy related words in this online dictionary - glossary.

Hubble constant; (E.P. Hubble; 1925) - from an ever growing glossary of space and astronomy definitions. Find the definitions for Hubble constant; (E.P. Hubble; 1925) and all your space and astronomy related words in this online dictionary - glossary.

Huygens, Christiaan (1629 - 1695) - from an ever growing glossary of space and astronomy definitions. Find the definitions for Huygens, Christiaan (1629 - 1695) and all your space and astronomy related words in this online dictionary - glossary.

hydrogen - from an ever growing glossary of space and astronomy definitions. Find the definitions for hydrogen and all your space and astronomy related words in this online dictionary - glossary.

ice - from an ever growing glossary of space and astronomy definitions. Find the definitions for ice and all your space and astronomy related words in this online dictionary - glossary.

ice as rock - from an ever growing glossary of space and astronomy definitions. Find the definitions for ice as rock and all your space and astronomy related words in this online dictionary - glossary.

ice volcanism - from an ever growing glossary of space and astronomy definitions. Find the definitions for ice volcanism and all your space and astronomy related words in this online dictionary - glossary.

ice-volcanic melt - from an ever growing glossary of space and astronomy definitions. Find the definitions for ice-volcanic melt and all your space and astronomy related words in this online dictionary - glossary.

impact crater - from an ever growing glossary of space and astronomy definitions. Find the definitions for impact crater and all your space and astronomy related words in this online dictionary - glossary.

impactor - from an ever growing glossary of space and astronomy definitions. Find the definitions for impactor and all your space and astronomy related words in this online dictionary - glossary.

implosion - from an ever growing glossary of space and astronomy definitions. Find the definitions for implosion and all your space and astronomy related words in this online dictionary - glossary.

inclination - from an ever growing glossary of space and astronomy definitions. Find the definitions for inclination and all your space and astronomy related words in this online dictionary - glossary.

inferior planets - from an ever growing glossary of space and astronomy definitions. Find the definitions for inferior planets and all your space and astronomy related words in this online dictionary - glossary.

infrared - from an ever growing glossary of space and astronomy definitions. Find the definitions for infrared and all your space and astronomy related words in this online dictionary - glossary.

interplanetary magnetic field (IMF) - from an ever growing glossary of space and astronomy definitions. Find the definitions for interplanetary magnetic field (IMF) and all your space and astronomy related words in this online dictionary - glossary.

interstellar medium - from an ever growing glossary of space and astronomy definitions. Find the definitions for interstellar medium and all your space and astronomy related words in this online dictionary - glossary.

ionic (or ionized) gas - from an ever growing glossary of space and astronomy definitions. Find the definitions for ionic (or ionized) gas and all your space and astronomy related words in this online dictionary - glossary.

ionosphere - from an ever growing glossary of space and astronomy definitions. Find the definitions for ionosphere and all your space and astronomy related words in this online dictionary - glossary.

ions - from an ever growing glossary of space and astronomy definitions. Find the definitions for ions and all your space and astronomy related words in this online dictionary - glossary.

jets - from an ever growing glossary of space and astronomy definitions. Find the definitions for jets and all your space and astronomy related words in this online dictionary - glossary.

Jovian planet - from an ever growing glossary of space and astronomy definitions. Find the definitions for Jovian planet and all your space and astronomy related words in this online dictionary - glossary.

Jupiter - from an ever growing glossary of space and astronomy definitions. Find the definitions for Jupiter and all your space and astronomy related words in this online dictionary - glossary.

Kelvin(K) - from an ever growing glossary of space and astronomy definitions. Find the definitions for Kelvin(K) and all your space and astronomy related words in this online dictionary - glossary.

Kepler's laws - from an ever growing glossary of space and astronomy definitions. Find the definitions for Kepler's laws and all your space and astronomy related words in this online dictionary - glossary.

Kepler, Johannes (1571-1630) - from an ever growing glossary of space and astronomy definitions. Find the definitions for Kepler, Johannes (1571-1630) and all your space and astronomy related words in this online dictionary - glossary.

kilogram (kg) - from an ever growing glossary of space and astronomy definitions. Find the definitions for kilogram (kg) and all your space and astronomy related words in this online dictionary - glossary.

kilometer (km) - from an ever growing glossary of space and astronomy definitions. Find the definitions for kilometer (km) and all your space and astronomy related words in this online dictionary - glossary.

kinematics - from an ever growing glossary of space and astronomy definitions. Find the definitions for kinematics and all your space and astronomy related words in this online dictionary - glossary.

kinetic energy - from an ever growing glossary of space and astronomy definitions. Find the definitions for kinetic energy and all your space and astronomy related words in this online dictionary - glossary.

Kirchhoff's law of radiation (G.R. Kirchhoff) - from an ever growing glossary of space and astronomy definitions. Find the definitions for Kirchhoff's law of radiation (G.R. Kirchhoff) and all your space and astronomy related words in this online dictionary - glossary.

Kirchhoff's laws (G.R. Kirchhoff) - from an ever growing glossary of space and astronomy definitions. Find the definitions for Kirchhoff's laws (G.R. Kirchhoff) and all your space and astronomy related words in this online dictionary - glossary.

labes - from an ever growing glossary of space and astronomy definitions. Find the definitions for labes and all your space and astronomy related words in this online dictionary - glossary.

labyrinthus - from an ever growing glossary of space and astronomy definitions. Find the definitions for labyrinthus and all your space and astronomy related words in this online dictionary - glossary.

lacus - from an ever growing glossary of space and astronomy definitions. Find the definitions for lacus and all your space and astronomy related words in this online dictionary - glossary.

Lagrange points - from an ever growing glossary of space and astronomy definitions. Find the definitions for Lagrange points and all your space and astronomy related words in this online dictionary - glossary.

Lagrange, Joseph (1736 - 1813) - from an ever growing glossary of space and astronomy definitions. Find the definitions for Lagrange, Joseph (1736 - 1813) and all your space and astronomy related words in this online dictionary - glossary.

laser - from an ever growing glossary of space and astronomy definitions. Find the definitions for laser and all your space and astronomy related words in this online dictionary - glossary.

latitude - from an ever growing glossary of space and astronomy definitions. Find the definitions for latitude and all your space and astronomy related words in this online dictionary - glossary.

leading hemisphere - from an ever growing glossary of space and astronomy definitions. Find the definitions for leading hemisphere and all your space and astronomy related words in this online dictionary - glossary.

lidar - from an ever growing glossary of space and astronomy definitions. Find the definitions for lidar and all your space and astronomy related words in this online dictionary - glossary.

light - from an ever growing glossary of space and astronomy definitions. Find the definitions for light and all your space and astronomy related words in this online dictionary - glossary.

light curve - from an ever growing glossary of space and astronomy definitions. Find the definitions for light curve and all your space and astronomy related words in this online dictionary - glossary.

light pollution - from an ever growing glossary of space and astronomy definitions. Find the definitions for light pollution and all your space and astronomy related words in this online dictionary - glossary.

light-year - from an ever growing glossary of space and astronomy definitions. Find the definitions for light-year and all your space and astronomy related words in this online dictionary - glossary.

limb - from an ever growing glossary of space and astronomy definitions. Find the definitions for limb and all your space and astronomy related words in this online dictionary - glossary.

linea - from an ever growing glossary of space and astronomy definitions. Find the definitions for linea and all your space and astronomy related words in this online dictionary - glossary.

liquid crystal - from an ever growing glossary of space and astronomy definitions. Find the definitions for liquid crystal and all your space and astronomy related words in this online dictionary - glossary.

LISA (Laser Interferometer Space Antenna) - from an ever growing glossary of space and astronomy definitions. Find the definitions for LISA (Laser Interferometer Space Antenna) and all your space and astronomy related words in this online dictionary - glossary.

liter - from an ever growing glossary of space and astronomy definitions. Find the definitions for liter and all your space and astronomy related words in this online dictionary - glossary.

longitude - from an ever growing glossary of space and astronomy definitions. Find the definitions for longitude and all your space and astronomy related words in this online dictionary - glossary.

luminosity - from an ever growing glossary of space and astronomy definitions. Find the definitions for luminosity and all your space and astronomy related words in this online dictionary - glossary.

lunar - from an ever growing glossary of space and astronomy definitions. Find the definitions for lunar and all your space and astronomy related words in this online dictionary - glossary.

lunar month - from an ever growing glossary of space and astronomy definitions. Find the definitions for lunar month and all your space and astronomy related words in this online dictionary - glossary.

macula - from an ever growing glossary of space and astronomy definitions. Find the definitions for macula and all your space and astronomy related words in this online dictionary - glossary.

magnetic - from an ever growing glossary of space and astronomy definitions. Find the definitions for magnetic and all your space and astronomy related words in this online dictionary - glossary.

magnetic field - from an ever growing glossary of space and astronomy definitions. Find the definitions for magnetic field and all your space and astronomy related words in this online dictionary - glossary.

magnetic pole - from an ever growing glossary of space and astronomy definitions. Find the definitions for magnetic pole and all your space and astronomy related words in this online dictionary - glossary.

magnetosphere - from an ever growing glossary of space and astronomy definitions. Find the definitions for magnetosphere and all your space and astronomy related words in this online dictionary - glossary.

magnetotail - from an ever growing glossary of space and astronomy definitions. Find the definitions for magnetotail and all your space and astronomy related words in this online dictionary - glossary.

magnitude - from an ever growing glossary of space and astronomy definitions. Find the definitions for magnitude and all your space and astronomy related words in this online dictionary - glossary.

mare - from an ever growing glossary of space and astronomy definitions. Find the definitions for mare and all your space and astronomy related words in this online dictionary - glossary.

Mars - from an ever growing glossary of space and astronomy definitions. Find the definitions for Mars and all your space and astronomy related words in this online dictionary - glossary.

mass - from an ever growing glossary of space and astronomy definitions. Find the definitions for mass and all your space and astronomy related words in this online dictionary - glossary.

mass wasting - from an ever growing glossary of space and astronomy definitions. Find the definitions for mass wasting and all your space and astronomy related words in this online dictionary - glossary.

matter - from an ever growing glossary of space and astronomy definitions. Find the definitions for matter and all your space and astronomy related words in this online dictionary - glossary.

mega-ton - from an ever growing glossary of space and astronomy definitions. Find the definitions for mega-ton and all your space and astronomy related words in this online dictionary - glossary.

mensa - from an ever growing glossary of space and astronomy definitions. Find the definitions for mensa and all your space and astronomy related words in this online dictionary - glossary.

Mercury - from an ever growing glossary of space and astronomy definitions. Find the definitions for Mercury and all your space and astronomy related words in this online dictionary - glossary.

Messier, Charles (1730 - 1817) - from an ever growing glossary of space and astronomy definitions. Find the definitions for Messier, Charles (1730 - 1817) and all your space and astronomy related words in this online dictionary - glossary.

metal - from an ever growing glossary of space and astronomy definitions. Find the definitions for metal and all your space and astronomy related words in this online dictionary - glossary.

meteor - from an ever growing glossary of space and astronomy definitions. Find the definitions for meteor and all your space and astronomy related words in this online dictionary - glossary.

meteorite - from an ever growing glossary of space and astronomy definitions. Find the definitions for meteorite and all your space and astronomy related words in this online dictionary - glossary.

meter; m - from an ever growing glossary of space and astronomy definitions. Find the definitions for meter; m and all your space and astronomy related words in this online dictionary - glossary.

methane - from an ever growing glossary of space and astronomy definitions. Find the definitions for methane and all your space and astronomy related words in this online dictionary - glossary.

micron - from an ever growing glossary of space and astronomy definitions. Find the definitions for micron and all your space and astronomy related words in this online dictionary - glossary.

microquasar - from an ever growing glossary of space and astronomy definitions. Find the definitions for microquasar and all your space and astronomy related words in this online dictionary - glossary.

microwave - from an ever growing glossary of space and astronomy definitions. Find the definitions for microwave and all your space and astronomy related words in this online dictionary - glossary.

mid-oceanridge - from an ever growing glossary of space and astronomy definitions. Find the definitions for mid-oceanridge and all your space and astronomy related words in this online dictionary - glossary.

Milky Way Galaxy - from an ever growing glossary of space and astronomy definitions. Find the definitions for Milky Way Galaxy and all your space and astronomy related words in this online dictionary - glossary.

millibar - from an ever growing glossary of space and astronomy definitions. Find the definitions for millibar and all your space and astronomy related words in this online dictionary - glossary.

minor planets - from an ever growing glossary of space and astronomy definitions. Find the definitions for minor planets and all your space and astronomy related words in this online dictionary - glossary.

mons - from an ever growing glossary of space and astronomy definitions. Find the definitions for mons and all your space and astronomy related words in this online dictionary - glossary.

moon - from an ever growing glossary of space and astronomy definitions. Find the definitions for moon and all your space and astronomy related words in this online dictionary - glossary.

morphology - from an ever growing glossary of space and astronomy definitions. Find the definitions for morphology and all your space and astronomy related words in this online dictionary - glossary.

Nebula - from an ever growing glossary of space and astronomy definitions. Find the definitions for Nebula and all your space and astronomy related words in this online dictionary - glossary.

nephelometer - from an ever growing glossary of space and astronomy definitions. Find the definitions for nephelometer and all your space and astronomy related words in this online dictionary - glossary.

Neptune - from an ever growing glossary of space and astronomy definitions. Find the definitions for Neptune and all your space and astronomy related words in this online dictionary - glossary.

neutrino - from an ever growing glossary of space and astronomy definitions. Find the definitions for neutrino and all your space and astronomy related words in this online dictionary - glossary.

neutron - from an ever growing glossary of space and astronomy definitions. Find the definitions for neutron and all your space and astronomy related words in this online dictionary - glossary.

neutron star - from an ever growing glossary of space and astronomy definitions. Find the definitions for neutron star and all your space and astronomy related words in this online dictionary - glossary.

Newton's law of universal gravitation (Sir I. Newton) - from an ever growing glossary of space and astronomy definitions. Find the definitions for Newton's law of universal gravitation (Sir I. Newton) and all your space and astronomy related words in this online dictionary - glossary.

Newton's laws of motion (Sir I. Newton) - from an ever growing glossary of space and astronomy definitions. Find the definitions for Newton's laws of motion (Sir I. Newton) and all your space and astronomy related words in this online dictionary - glossary.

Newton, Isaac 1642 - 1727 - from an ever growing glossary of space and astronomy definitions. Find the definitions for Newton, Isaac 1642 - 1727 and all your space and astronomy related words in this online dictionary - glossary.

nitrogen - from an ever growing glossary of space and astronomy definitions. Find the definitions for nitrogen and all your space and astronomy related words in this online dictionary - glossary.

noise - from an ever growing glossary of space and astronomy definitions. Find the definitions for noise and all your space and astronomy related words in this online dictionary - glossary.

nova (plural: novae) - from an ever growing glossary of space and astronomy definitions. Find the definitions for nova (plural: novae) and all your space and astronomy related words in this online dictionary - glossary.

nuclear fusion - from an ever growing glossary of space and astronomy definitions. Find the definitions for nuclear fusion and all your space and astronomy related words in this online dictionary - glossary.

nucleus - from an ever growing glossary of space and astronomy definitions. Find the definitions for nucleus and all your space and astronomy related words in this online dictionary - glossary.

occultation - from an ever growing glossary of space and astronomy definitions. Find the definitions for occultation and all your space and astronomy related words in this online dictionary - glossary.

oceanus - from an ever growing glossary of space and astronomy definitions. Find the definitions for oceanus and all your space and astronomy related words in this online dictionary - glossary.

old - from an ever growing glossary of space and astronomy definitions. Find the definitions for old and all your space and astronomy related words in this online dictionary - glossary.

Oort Cloud - from an ever growing glossary of space and astronomy definitions. Find the definitions for Oort Cloud and all your space and astronomy related words in this online dictionary - glossary.

opacity - from an ever growing glossary of space and astronomy definitions. Find the definitions for opacity and all your space and astronomy related words in this online dictionary - glossary.

opposition - from an ever growing glossary of space and astronomy definitions. Find the definitions for opposition and all your space and astronomy related words in this online dictionary - glossary.

opposition surge - from an ever growing glossary of space and astronomy definitions. Find the definitions for opposition surge and all your space and astronomy related words in this online dictionary - glossary.

orbit - from an ever growing glossary of space and astronomy definitions. Find the definitions for orbit and all your space and astronomy related words in this online dictionary - glossary.

orbital period - from an ever growing glossary of space and astronomy definitions. Find the definitions for orbital period and all your space and astronomy related words in this online dictionary - glossary.

orbital resonance - from an ever growing glossary of space and astronomy definitions. Find the definitions for orbital resonance and all your space and astronomy related words in this online dictionary - glossary.

organic compounds - from an ever growing glossary of space and astronomy definitions. Find the definitions for organic compounds and all your space and astronomy related words in this online dictionary - glossary.

Outer Space Outer Space Outer Space Outer Space

ovoid - from an ever growing glossary of space and astronomy definitions. Find the definitions for ovoid and all your space and astronomy related words in this online dictionary - glossary.

oxygen - from an ever growing glossary of space and astronomy definitions. Find the definitions for oxygen and all your space and astronomy related words in this online dictionary - glossary.

pair production - from an ever growing glossary of space and astronomy definitions. Find the definitions for pair production and all your space and astronomy related words in this online dictionary - glossary.

palimpsest - from an ever growing glossary of space and astronomy definitions. Find the definitions for palimpsest and all your space and astronomy related words in this online dictionary - glossary.

palus - from an ever growing glossary of space and astronomy definitions. Find the definitions for palus and all your space and astronomy related words in this online dictionary - glossary.

parallax - from an ever growing glossary of space and astronomy definitions. Find the definitions for parallax and all your space and astronomy related words in this online dictionary - glossary.

parsec - from an ever growing glossary of space and astronomy definitions. Find the definitions for parsec and all your space and astronomy related words in this online dictionary - glossary.

patera - from an ever growing glossary of space and astronomy definitions. Find the definitions for patera and all your space and astronomy related words in this online dictionary - glossary.

penumbra - from an ever growing glossary of space and astronomy definitions. Find the definitions for penumbra and all your space and astronomy related words in this online dictionary - glossary.

periastron - from an ever growing glossary of space and astronomy definitions. Find the definitions for periastron and all your space and astronomy related words in this online dictionary - glossary.

perigee - from an ever growing glossary of space and astronomy definitions. Find the definitions for perigee and all your space and astronomy related words in this online dictionary - glossary.

perihelion - from an ever growing glossary of space and astronomy definitions. Find the definitions for perihelion and all your space and astronomy related words in this online dictionary - glossary.

perturb - from an ever growing glossary of space and astronomy definitions. Find the definitions for perturb and all your space and astronomy related words in this online dictionary - glossary.

phaseangle - from an ever growing glossary of space and astronomy definitions. Find the definitions for phaseangle and all your space and astronomy related words in this online dictionary - glossary.

photoelectric effect - from an ever growing glossary of space and astronomy definitions. Find the definitions for photoelectric effect and all your space and astronomy related words in this online dictionary - glossary.

photometry - from an ever growing glossary of space and astronomy definitions. Find the definitions for photometry and all your space and astronomy related words in this online dictionary - glossary.

photon - from an ever growing glossary of space and astronomy definitions. Find the definitions for photon and all your space and astronomy related words in this online dictionary - glossary.

photosphere - from an ever growing glossary of space and astronomy definitions. Find the definitions for photosphere and all your space and astronomy related words in this online dictionary - glossary.

pi - from an ever growing glossary of space and astronomy definitions. Find the definitions for pi and all your space and astronomy related words in this online dictionary - glossary.

pixel - from an ever growing glossary of space and astronomy definitions. Find the definitions for pixel and all your space and astronomy related words in this online dictionary - glossary.

Planck constant; h - from an ever growing glossary of space and astronomy definitions. Find the definitions for Planck constant; h and all your space and astronomy related words in this online dictionary - glossary.

Planck equation - from an ever growing glossary of space and astronomy definitions. Find the definitions for Planck equation and all your space and astronomy related words in this online dictionary - glossary.

planet - from an ever growing glossary of space and astronomy definitions. Find the definitions for planet and all your space and astronomy related words in this online dictionary - glossary.

planetary nebula - from an ever growing glossary of space and astronomy definitions. Find the definitions for planetary nebula and all your space and astronomy related words in this online dictionary - glossary.

planetesimals - from an ever growing glossary of space and astronomy definitions. Find the definitions for planetesimals and all your space and astronomy related words in this online dictionary - glossary.

planetoid - from an ever growing glossary of space and astronomy definitions. Find the definitions for planetoid and all your space and astronomy related words in this online dictionary - glossary.

planitia - from an ever growing glossary of space and astronomy definitions. Find the definitions for planitia and all your space and astronomy related words in this online dictionary - glossary.

planum - from an ever growing glossary of space and astronomy definitions. Find the definitions for planum and all your space and astronomy related words in this online dictionary - glossary.

plasma - from an ever growing glossary of space and astronomy definitions. Find the definitions for plasma and all your space and astronomy related words in this online dictionary - glossary.

plate tectonics - from an ever growing glossary of space and astronomy definitions. Find the definitions for plate tectonics and all your space and astronomy related words in this online dictionary - glossary.

Pluto - from an ever growing glossary of space and astronomy definitions. Find the definitions for Pluto and all your space and astronomy related words in this online dictionary - glossary.

pointing - from an ever growing glossary of space and astronomy definitions. Find the definitions for pointing and all your space and astronomy related words in this online dictionary - glossary.

polarimetry - from an ever growing glossary of space and astronomy definitions. Find the definitions for polarimetry and all your space and astronomy related words in this online dictionary - glossary.

polarization - from an ever growing glossary of space and astronomy definitions. Find the definitions for polarization and all your space and astronomy related words in this online dictionary - glossary.

positron - from an ever growing glossary of space and astronomy definitions. Find the definitions for positron and all your space and astronomy related words in this online dictionary - glossary.

power - from an ever growing glossary of space and astronomy definitions. Find the definitions for power and all your space and astronomy related words in this online dictionary - glossary.

prominence - from an ever growing glossary of space and astronomy definitions. Find the definitions for prominence and all your space and astronomy related words in this online dictionary - glossary.

promontorium - from an ever growing glossary of space and astronomy definitions. Find the definitions for promontorium and all your space and astronomy related words in this online dictionary - glossary.

proton - from an ever growing glossary of space and astronomy definitions. Find the definitions for proton and all your space and astronomy related words in this online dictionary - glossary.

protostar - from an ever growing glossary of space and astronomy definitions. Find the definitions for protostar and all your space and astronomy related words in this online dictionary - glossary.

Ptolemy (ca. 100-ca. 170) - from an ever growing glossary of space and astronomy definitions. Find the definitions for Ptolemy (ca. 100-ca. 170) and all your space and astronomy related words in this online dictionary - glossary.

pulsar - from an ever growing glossary of space and astronomy definitions. Find the definitions for pulsar and all your space and astronomy related words in this online dictionary - glossary.

quasar - from an ever growing glossary of space and astronomy definitions. Find the definitions for quasar and all your space and astronomy related words in this online dictionary - glossary.

quasi-stellar source (QSS) - from an ever growing glossary of space and astronomy definitions. Find the definitions for quasi-stellar source (QSS) and all your space and astronomy related words in this online dictionary - glossary.

radar - from an ever growing glossary of space and astronomy definitions. Find the definitions for radar and all your space and astronomy related words in this online dictionary - glossary.

radial velocity - from an ever growing glossary of space and astronomy definitions. Find the definitions for radial velocity and all your space and astronomy related words in this online dictionary - glossary.

radian; rad - from an ever growing glossary of space and astronomy definitions. Find the definitions for radian; rad and all your space and astronomy related words in this online dictionary - glossary.

radiation - from an ever growing glossary of space and astronomy definitions. Find the definitions for radiation and all your space and astronomy related words in this online dictionary - glossary.

radiation belt - from an ever growing glossary of space and astronomy definitions. Find the definitions for radiation belt and all your space and astronomy related words in this online dictionary - glossary.

rawdata - from an ever growing glossary of space and astronomy definitions. Find the definitions for rawdata and all your space and astronomy related words in this online dictionary - glossary.

Rayleigh criterion; resolving power - from an ever growing glossary of space and astronomy definitions. Find the definitions for Rayleigh criterion; resolving power and all your space and astronomy related words in this online dictionary - glossary.

Rayleigh-Taylor instabilities - from an ever growing glossary of space and astronomy definitions. Find the definitions for Rayleigh-Taylor instabilities and all your space and astronomy related words in this online dictionary - glossary.

red giant - from an ever growing glossary of space and astronomy definitions. Find the definitions for red giant and all your space and astronomy related words in this online dictionary - glossary.

reddening - from an ever growing glossary of space and astronomy definitions. Find the definitions for reddening and all your space and astronomy related words in this online dictionary - glossary.

redshift - from an ever growing glossary of space and astronomy definitions. Find the definitions for redshift and all your space and astronomy related words in this online dictionary - glossary.

reflection law - from an ever growing glossary of space and astronomy definitions. Find the definitions for reflection law and all your space and astronomy related words in this online dictionary - glossary.

refraction - from an ever growing glossary of space and astronomy definitions. Find the definitions for refraction and all your space and astronomy related words in this online dictionary - glossary.

refractive index (index of refraction) - from an ever growing glossary of space and astronomy definitions. Find the definitions for refractive index (index of refraction) and all your space and astronomy related words in this online dictionary - glossary.

regio - from an ever growing glossary of space and astronomy definitions. Find the definitions for regio and all your space and astronomy related words in this online dictionary - glossary.

regolith - from an ever growing glossary of space and astronomy definitions. Find the definitions for regolith and all your space and astronomy related words in this online dictionary - glossary.

relativeage - from an ever growing glossary of space and astronomy definitions. Find the definitions for relativeage and all your space and astronomy related words in this online dictionary - glossary.

relativity principle - from an ever growing glossary of space and astronomy definitions. Find the definitions for relativity principle and all your space and astronomy related words in this online dictionary - glossary.

Relativity, Theory of - from an ever growing glossary of space and astronomy definitions. Find the definitions for Relativity, Theory of and all your space and astronomy related words in this online dictionary - glossary.

resolution - from an ever growing glossary of space and astronomy definitions. Find the definitions for resolution and all your space and astronomy related words in this online dictionary - glossary.

resonance - from an ever growing glossary of space and astronomy definitions. Find the definitions for resonance and all your space and astronomy related words in this online dictionary - glossary.

resurfacing - from an ever growing glossary of space and astronomy definitions. Find the definitions for resurfacing and all your space and astronomy related words in this online dictionary - glossary.

reticulum - from an ever growing glossary of space and astronomy definitions. Find the definitions for reticulum and all your space and astronomy related words in this online dictionary - glossary.

retrograde - from an ever growing glossary of space and astronomy definitions. Find the definitions for retrograde and all your space and astronomy related words in this online dictionary - glossary.

retrograde motion - from an ever growing glossary of space and astronomy definitions. Find the definitions for retrograde motion and all your space and astronomy related words in this online dictionary - glossary.

revolution - from an ever growing glossary of space and astronomy definitions. Find the definitions for revolution and all your space and astronomy related words in this online dictionary - glossary.

rift valley - from an ever growing glossary of space and astronomy definitions. Find the definitions for rift valley and all your space and astronomy related words in this online dictionary - glossary.

Right Ascension - from an ever growing glossary of space and astronomy definitions. Find the definitions for Right Ascension and all your space and astronomy related words in this online dictionary - glossary.

rima - from an ever growing glossary of space and astronomy definitions. Find the definitions for rima and all your space and astronomy related words in this online dictionary - glossary.

Ritter, Johann Wilhelm (1776 - 1810) - from an ever growing glossary of space and astronomy definitions. Find the definitions for Ritter, Johann Wilhelm (1776 - 1810) and all your space and astronomy related words in this online dictionary - glossary.

Roche limit - from an ever growing glossary of space and astronomy definitions. Find the definitions for Roche limit and all your space and astronomy related words in this online dictionary - glossary.

Roche lobe - from an ever growing glossary of space and astronomy definitions. Find the definitions for Roche lobe and all your space and astronomy related words in this online dictionary - glossary.

rotation - from an ever growing glossary of space and astronomy definitions. Find the definitions for rotation and all your space and astronomy related words in this online dictionary - glossary.

rupes - from an ever growing glossary of space and astronomy definitions. Find the definitions for rupes and all your space and astronomy related words in this online dictionary - glossary.

Röntgen, Wilhelm Conrad (1845 - 1923) - from an ever growing glossary of space and astronomy definitions. Find the definitions for Röntgen, Wilhelm Conrad (1845 - 1923) and all your space and astronomy related words in this online dictionary - glossary.

satellite - from an ever growing glossary of space and astronomy definitions. Find the definitions for satellite and all your space and astronomy related words in this online dictionary - glossary.

saturation - from an ever growing glossary of space and astronomy definitions. Find the definitions for saturation and all your space and astronomy related words in this online dictionary - glossary.

Saturn - from an ever growing glossary of space and astronomy definitions. Find the definitions for Saturn and all your space and astronomy related words in this online dictionary - glossary.

scarp - from an ever growing glossary of space and astronomy definitions. Find the definitions for scarp and all your space and astronomy related words in this online dictionary - glossary.

Schwarzschild black hole - from an ever growing glossary of space and astronomy definitions. Find the definitions for Schwarzschild black hole and all your space and astronomy related words in this online dictionary - glossary.

Schwarzschild radius - from an ever growing glossary of space and astronomy definitions. Find the definitions for Schwarzschild radius and all your space and astronomy related words in this online dictionary - glossary.

scientific notation - from an ever growing glossary of space and astronomy definitions. Find the definitions for scientific notation and all your space and astronomy related words in this online dictionary - glossary.

scopulus - from an ever growing glossary of space and astronomy definitions. Find the definitions for scopulus and all your space and astronomy related words in this online dictionary - glossary.

sea floor spreading - from an ever growing glossary of space and astronomy definitions. Find the definitions for sea floor spreading and all your space and astronomy related words in this online dictionary - glossary.

second; s - from an ever growing glossary of space and astronomy definitions. Find the definitions for second; s and all your space and astronomy related words in this online dictionary - glossary.

semimajor axis - from an ever growing glossary of space and astronomy definitions. Find the definitions for semimajor axis and all your space and astronomy related words in this online dictionary - glossary.

sensitivity - from an ever growing glossary of space and astronomy definitions. Find the definitions for sensitivity and all your space and astronomy related words in this online dictionary - glossary.

Seven Sages - from an ever growing glossary of space and astronomy definitions. Find the definitions for Seven Sages and all your space and astronomy related words in this online dictionary - glossary.

Seyfert galaxy - from an ever growing glossary of space and astronomy definitions. Find the definitions for Seyfert galaxy and all your space and astronomy related words in this online dictionary - glossary.

shepherd satellite - from an ever growing glossary of space and astronomy definitions. Find the definitions for shepherd satellite and all your space and astronomy related words in this online dictionary - glossary.

shock wave - from an ever growing glossary of space and astronomy definitions. Find the definitions for shock wave and all your space and astronomy related words in this online dictionary - glossary.

Shoemaker-Levy9 (S-L9) - from an ever growing glossary of space and astronomy definitions. Find the definitions for Shoemaker-Levy9 (S-L9) and all your space and astronomy related words in this online dictionary - glossary.

shooting star - from an ever growing glossary of space and astronomy definitions. Find the definitions for shooting star and all your space and astronomy related words in this online dictionary - glossary.

sidereal - from an ever growing glossary of space and astronomy definitions. Find the definitions for sidereal and all your space and astronomy related words in this online dictionary - glossary.

sidereal month - from an ever growing glossary of space and astronomy definitions. Find the definitions for sidereal month and all your space and astronomy related words in this online dictionary - glossary.

silicate - from an ever growing glossary of space and astronomy definitions. Find the definitions for silicate and all your space and astronomy related words in this online dictionary - glossary.

singularity - from an ever growing glossary of space and astronomy definitions. Find the definitions for singularity and all your space and astronomy related words in this online dictionary - glossary.

sinus - from an ever growing glossary of space and astronomy definitions. Find the definitions for sinus and all your space and astronomy related words in this online dictionary - glossary.

Solar - from an ever growing glossary of space and astronomy definitions. Find the definitions for Solar and all your space and astronomy related words in this online dictionary - glossary.

solar cycle - from an ever growing glossary of space and astronomy definitions. Find the definitions for solar cycle and all your space and astronomy related words in this online dictionary - glossary.

Solar Flare - from an ever growing glossary of space and astronomy definitions. Find the definitions for Solar Flare and all your space and astronomy related words in this online dictionary - glossary.

solar mass - from an ever growing glossary of space and astronomy definitions. Find the definitions for solar mass and all your space and astronomy related words in this online dictionary - glossary.

solar nebula - from an ever growing glossary of space and astronomy definitions. Find the definitions for solar nebula and all your space and astronomy related words in this online dictionary - glossary.

solar system - from an ever growing glossary of space and astronomy definitions. Find the definitions for solar system and all your space and astronomy related words in this online dictionary - glossary.

solar wind - from an ever growing glossary of space and astronomy definitions. Find the definitions for solar wind and all your space and astronomy related words in this online dictionary - glossary.

special relativity - from an ever growing glossary of space and astronomy definitions. Find the definitions for special relativity and all your space and astronomy related words in this online dictionary - glossary.

spectral line - from an ever growing glossary of space and astronomy definitions. Find the definitions for spectral line and all your space and astronomy related words in this online dictionary - glossary.

Spectrograph; The picture produced by a spectroscope. Astronomy and Space Online Dictionary definition of Spectrograph; The picture produced by a spectroscope.

spectrograph - from an ever growing glossary of space and astronomy definitions. Find the definitions for spectrograph and all your space and astronomy related words in this online dictionary - glossary.

spectrometer - from an ever growing glossary of space and astronomy definitions. Find the definitions for spectrometer and all your space and astronomy related words in this online dictionary - glossary.

Spectroscope - from an ever growing glossary of space and astronomy definitions. Find the definitions for Spectroscope and all your space and astronomy related words in this online dictionary - glossary.

spectroscopy - from an ever growing glossary of space and astronomy definitions. Find the definitions for spectroscopy and all your space and astronomy related words in this online dictionary - glossary.

spectrum (plural: spectra) - from an ever growing glossary of space and astronomy definitions. Find the definitions for spectrum (plural: spectra) and all your space and astronomy related words in this online dictionary - glossary.

speed - from an ever growing glossary of space and astronomy definitions. Find the definitions for speed and all your space and astronomy related words in this online dictionary - glossary.

speed of light - from an ever growing glossary of space and astronomy definitions. Find the definitions for speed of light and all your space and astronomy related words in this online dictionary - glossary.

spicules - from an ever growing glossary of space and astronomy definitions. Find the definitions for spicules and all your space and astronomy related words in this online dictionary - glossary.

star - from an ever growing glossary of space and astronomy definitions. Find the definitions for star and all your space and astronomy related words in this online dictionary - glossary.

star cluster - from an ever growing glossary of space and astronomy definitions. Find the definitions for star cluster and all your space and astronomy related words in this online dictionary - glossary.

Stefan-Boltzmann constant; sigma (Stefan, L. Boltzmann) - from an ever growing glossary of space and astronomy definitions. Find the definitions for Stefan-Boltzmann constant; sigma (Stefan, L. Boltzmann) and all your space and astronomy related words in this online dictionary - glossary.

Stefan-Boltzmann law (Stefan, L. Boltzmann) - from an ever growing glossary of space and astronomy definitions. Find the definitions for Stefan-Boltzmann law (Stefan, L. Boltzmann) and all your space and astronomy related words in this online dictionary - glossary.

stellar classification - from an ever growing glossary of space and astronomy definitions. Find the definitions for stellar classification and all your space and astronomy related words in this online dictionary - glossary.

stellar wind - from an ever growing glossary of space and astronomy definitions. Find the definitions for stellar wind and all your space and astronomy related words in this online dictionary - glossary.

steradian; sr - from an ever growing glossary of space and astronomy definitions. Find the definitions for steradian; sr and all your space and astronomy related words in this online dictionary - glossary.

stratigraphy - from an ever growing glossary of space and astronomy definitions. Find the definitions for stratigraphy and all your space and astronomy related words in this online dictionary - glossary.

stratosphere - from an ever growing glossary of space and astronomy definitions. Find the definitions for stratosphere and all your space and astronomy related words in this online dictionary - glossary.

subduction zone - from an ever growing glossary of space and astronomy definitions. Find the definitions for subduction zone and all your space and astronomy related words in this online dictionary - glossary.

sublime or sublimate - from an ever growing glossary of space and astronomy definitions. Find the definitions for sublime or sublimate and all your space and astronomy related words in this online dictionary - glossary.

subsolar - from an ever growing glossary of space and astronomy definitions. Find the definitions for subsolar and all your space and astronomy related words in this online dictionary - glossary.

sulcus - from an ever growing glossary of space and astronomy definitions. Find the definitions for sulcus and all your space and astronomy related words in this online dictionary - glossary.

sulfuric acid - from an ever growing glossary of space and astronomy definitions. Find the definitions for sulfuric acid and all your space and astronomy related words in this online dictionary - glossary.

Sun - from an ever growing glossary of space and astronomy definitions. Find the definitions for Sun and all your space and astronomy related words in this online dictionary - glossary.

sun spot - from an ever growing glossary of space and astronomy definitions. Find the definitions for sun spot and all your space and astronomy related words in this online dictionary - glossary.

superior planets - from an ever growing glossary of space and astronomy definitions. Find the definitions for superior planets and all your space and astronomy related words in this online dictionary - glossary.

supernova (plural: supernovae) - from an ever growing glossary of space and astronomy definitions. Find the definitions for supernova (plural: supernovae) and all your space and astronomy related words in this online dictionary - glossary.

surface - from an ever growing glossary of space and astronomy definitions. Find the definitions for surface and all your space and astronomy related words in this online dictionary - glossary.

Swift - from an ever growing glossary of space and astronomy definitions. Find the definitions for Swift and all your space and astronomy related words in this online dictionary - glossary.

synchronous orbit radius - from an ever growing glossary of space and astronomy definitions. Find the definitions for synchronous orbit radius and all your space and astronomy related words in this online dictionary - glossary.

synchronous rotation - from an ever growing glossary of space and astronomy definitions. Find the definitions for synchronous rotation and all your space and astronomy related words in this online dictionary - glossary.

synchrotron radiation - from an ever growing glossary of space and astronomy definitions. Find the definitions for synchrotron radiation and all your space and astronomy related words in this online dictionary - glossary.

tail - from an ever growing glossary of space and astronomy definitions. Find the definitions for tail and all your space and astronomy related words in this online dictionary - glossary.

tectonic - from an ever growing glossary of space and astronomy definitions. Find the definitions for tectonic and all your space and astronomy related words in this online dictionary - glossary.

tectonism - from an ever growing glossary of space and astronomy definitions. Find the definitions for tectonism and all your space and astronomy related words in this online dictionary - glossary.

Telescope - from an ever growing glossary of space and astronomy definitions. Find the definitions for Telescope and all your space and astronomy related words in this online dictionary - glossary.

terminator - from an ever growing glossary of space and astronomy definitions. Find the definitions for terminator and all your space and astronomy related words in this online dictionary - glossary.

terra - from an ever growing glossary of space and astronomy definitions. Find the definitions for terra and all your space and astronomy related words in this online dictionary - glossary.

terrain - from an ever growing glossary of space and astronomy definitions. Find the definitions for terrain and all your space and astronomy related words in this online dictionary - glossary.

terrestrial planets - from an ever growing glossary of space and astronomy definitions. Find the definitions for terrestrial planets and all your space and astronomy related words in this online dictionary - glossary.

tessera - from an ever growing glossary of space and astronomy definitions. Find the definitions for tessera and all your space and astronomy related words in this online dictionary - glossary.

texture - from an ever growing glossary of space and astronomy definitions. Find the definitions for texture and all your space and astronomy related words in this online dictionary - glossary.

tholus - from an ever growing glossary of space and astronomy definitions. Find the definitions for tholus and all your space and astronomy related words in this online dictionary - glossary.

Thomson, William 1824 - 1907 - from an ever growing glossary of space and astronomy definitions. Find the definitions for Thomson, William 1824 - 1907 and all your space and astronomy related words in this online dictionary - glossary.

tidal heating - from an ever growing glossary of space and astronomy definitions. Find the definitions for tidal heating and all your space and astronomy related words in this online dictionary - glossary.

time dilation - from an ever growing glossary of space and astronomy definitions. Find the definitions for time dilation and all your space and astronomy related words in this online dictionary - glossary.

topography - from an ever growing glossary of space and astronomy definitions. Find the definitions for topography and all your space and astronomy related words in this online dictionary - glossary.

torus - from an ever growing glossary of space and astronomy definitions. Find the definitions for torus and all your space and astronomy related words in this online dictionary - glossary.

trailing hemisphere - from an ever growing glossary of space and astronomy definitions. Find the definitions for trailing hemisphere and all your space and astronomy related words in this online dictionary - glossary.

Trojan - from an ever growing glossary of space and astronomy definitions. Find the definitions for Trojan and all your space and astronomy related words in this online dictionary - glossary.

troposphere - from an ever growing glossary of space and astronomy definitions. Find the definitions for troposphere and all your space and astronomy related words in this online dictionary - glossary.

Uhuru - from an ever growing glossary of space and astronomy definitions. Find the definitions for Uhuru and all your space and astronomy related words in this online dictionary - glossary.

ultraviolet - from an ever growing glossary of space and astronomy definitions. Find the definitions for ultraviolet and all your space and astronomy related words in this online dictionary - glossary.

Ultraviolet Ray - from an ever growing glossary of space and astronomy definitions. Find the definitions for Ultraviolet Ray and all your space and astronomy related words in this online dictionary - glossary.

umbra - from an ever growing glossary of space and astronomy definitions. Find the definitions for umbra and all your space and astronomy related words in this online dictionary - glossary.

undae - from an ever growing glossary of space and astronomy definitions. Find the definitions for undae and all your space and astronomy related words in this online dictionary - glossary.

universal constant of gravitation; G - from an ever growing glossary of space and astronomy definitions. Find the definitions for universal constant of gravitation; G and all your space and astronomy related words in this online dictionary - glossary.

Universe - from an ever growing glossary of space and astronomy definitions. Find the definitions for Universe and all your space and astronomy related words in this online dictionary - glossary.

Uranus - from an ever growing glossary of space and astronomy definitions. Find the definitions for Uranus and all your space and astronomy related words in this online dictionary - glossary.

valles or vallis - from an ever growing glossary of space and astronomy definitions. Find the definitions for valles or vallis and all your space and astronomy related words in this online dictionary - glossary.

vastitas - from an ever growing glossary of space and astronomy definitions. Find the definitions for vastitas and all your space and astronomy related words in this online dictionary - glossary.

velocity - from an ever growing glossary of space and astronomy definitions. Find the definitions for velocity and all your space and astronomy related words in this online dictionary - glossary.

Venus - from an ever growing glossary of space and astronomy definitions. Find the definitions for Venus and all your space and astronomy related words in this online dictionary - glossary.

viscosity - from an ever growing glossary of space and astronomy definitions. Find the definitions for viscosity and all your space and astronomy related words in this online dictionary - glossary.

viscous relaxation - from an ever growing glossary of space and astronomy definitions. Find the definitions for viscous relaxation and all your space and astronomy related words in this online dictionary - glossary.

volatile - from an ever growing glossary of space and astronomy definitions. Find the definitions for volatile and all your space and astronomy related words in this online dictionary - glossary.

volcanic - from an ever growing glossary of space and astronomy definitions. Find the definitions for volcanic and all your space and astronomy related words in this online dictionary - glossary.

volcanism - from an ever growing glossary of space and astronomy definitions. Find the definitions for volcanism and all your space and astronomy related words in this online dictionary - glossary.

volcano - from an ever growing glossary of space and astronomy definitions. Find the definitions for volcano and all your space and astronomy related words in this online dictionary - glossary.

Watt - from an ever growing glossary of space and astronomy definitions. Find the definitions for Watt and all your space and astronomy related words in this online dictionary - glossary.

wave-particle duality - from an ever growing glossary of space and astronomy definitions. Find the definitions for wave-particle duality and all your space and astronomy related words in this online dictionary - glossary.

wavelength - from an ever growing glossary of space and astronomy definitions. Find the definitions for wavelength and all your space and astronomy related words in this online dictionary - glossary.

weathering - from an ever growing glossary of space and astronomy definitions. Find the definitions for weathering and all your space and astronomy related words in this online dictionary - glossary.

white dwarf - from an ever growing glossary of space and astronomy definitions. Find the definitions for white dwarf and all your space and astronomy related words in this online dictionary - glossary.

Wien's displacement law - from an ever growing glossary of space and astronomy definitions. Find the definitions for Wien's displacement law and all your space and astronomy related words in this online dictionary - glossary.

X-ray - from an ever growing glossary of space and astronomy definitions. Find the definitions for X-ray and all your space and astronomy related words in this online dictionary - glossary.

young - from an ever growing glossary of space and astronomy definitions. Find the definitions for young and all your space and astronomy related words in this online dictionary - glossary.

zenith - from an ever growing glossary of space and astronomy definitions. Find the definitions for zenith and all your space and astronomy related words in this online dictionary - glossary.

zodiacal light - from an ever growing glossary of space and astronomy definitions. Find the definitions for zodiacal light and all your space and astronomy related words in this online dictionary - glossary.

Gamma-rays are the highest energy electromagnetic radiation. These photons are produced by nuclear decay and nuclear fusion processes. Study of Gamma-rays are also important to the field of astronomy, where the most dynamic interactions in our Universe are also prominent emitters of very high energy radiation.

Infrared light, commonly called IR, is a form of electromagnetic radiation that has a wavelength that is a longer than visible light. This energy band is most commonly associated with that of thermal radiation, that is the energy emitted by objects near room temperature.

Radio waves are a form of electromagnetic radiation that cover a wide range of the complete spectrum. Many astronomical objects naturally produce radio waves, but they are also used in communication, computing and even cooking.

The microwave band is actually a subset of the broader radio band. But when the term "radio astronomy" is used, it is often in reference to observing microwave radiation specifically.

A Black Body object is any object which exhibits the specific behavior of completely absorbing all wavelengths of electromagnetic radiation. As a result of this, a black body is also a perfect emitted or electromagnetic radiation, the specific wavelength of which is determined by the object's temperature. While a "perfect" black body doesn't...

It is a term that seems to be used for many applications: light, nuclear danger, medical imaging and more. So what is radiation exactly?

Rotation and revolution are vital to the study of astronomy, as virtually all heavenly bodies undergo some rotational dynamics of some sort. But what are rotation and revolution exactly, and how are they different?

When we see stars in the night sky we are observing the radiation that escaped from their surface hundreds, thousands and perhaps millions of years ago. In order for us to be able to see such distant objects, these stars must emit massive amounts of energy. The measurement of this energy release is the luminosity.

When an object is redshifted the detected wavelengths appear shifted toward the "red" end of the electromagnetic spectrum. This occurs when an object is receding from the observer.

When an object is blueshifted, the radiation that the object is emitting appears to have a shorter wavelength than it should. This is because the object is approaching the observer, and therefore the emitted waves appear closer together than they actually are.

The doppler effect is a phenomenon by which a source's radiation appears to be of higher (blueshifted) or lower (redshifted) energy than it really is. This is caused by the object's motion relative to the observer, and is an important tool in astronomy as we try to understand the Universe.