Astronomy

Whether you're a casual stargazer or astronomy enthusiast, journey into outer space to investigate the solar system, stars, galaxies, and other wonders of our universe.

  • asteroid similar to Apophis
    Apophis: The Space Rock That Started a Panic
  • 800px-Astronomy_Amateur_3_V2.jpg
    7 Things to Consider Before Buying a Telescope
  • The worlds of the solar system explorable with small telescopes.
    Exploring the Planets With an Amateur Telescope
  • Portrait of Konstantin Tsiolkovsky
    The Life of Konstantin Tsiolkovsky, Rocket Science Pioneer
  • Enterprise replica from Star Trek
    Is Warp Drive From 'Star Trek' Possible?
  • Hermann Oberth statue
    The Life and Legacy of Hermann Oberth, German Rocket Theorist
  • astronaut jumpsuits
    How to Train to be an Astronaut
  • smiley face in the stars
    An Introduction to Gravitational Lensing
  • exoplanet
    Planets and Planet-hunting: The Search for Exoplanets
  • warp speed illustration
    Could Matter-Antimatter Reactors Work?
  • Soyuz TMA-19 space capsule in space
    A Short History of Roscosmos and the Soviet Space Program
  • The Big Dipper
    The Big Dipper
  • star trek transporter
    Star Trek: Instantaneous Matter Transport
  • A blood moon is one name for the reddish moon viewed during a total lunar eclipse.
    Lunar Eclipse and the Blood Moon
  • Artist rendering showing Haumea and other objects in the solar system.
    Explore the Dwarf Planet Haumea
  • A star chart showing the Big Dipper
    Star Charts: How to Find and Use Them for Skygazing
  • 4_m51_lg.jpg
    How X-Ray Astronomy Works
  • Spitzer Space Telescope Pictures Gallery - Great Observatories Present Rainbow of a Galaxy
    Light and Astronomy
  • John W. Young, astronaut
    Biography of John W. Young
  • synestia
    Learn About the Synestia Phase of a Planet's Formation
  • Ken Mattingly II and Thomas Hartsfield in training.
    Biography of Ken Mattingly, Apollo and Shuttle Astronaut
  • Horsehead Nebula
    The Horsehead Nebula: A Dark Cloud With a Familiar Shape
  • Apollo 1 Mission and Fire Pictures - Apollo 1 Fire
    The Apollo 1 Fire
  • Space Shuttle
    The History of Space Shuttle Challenger
  • A simplified Herzprung-Russell Diagram showing how stars are classified.
    Diagramming the Lives of Stars
  • ion thruster test
    Sub-light Speed in Star Trek: Can It Be Done?
  • warp drive
    The Science of Star Trek
  • screenshot of Google Sky
    Use Google Earth to Explore the Cosmos Beyond Our Planet
  • 30th Anniversary of Apollo 11 Moon Mission
    Space First: From Space Dogs to a Tesla
  • incoming meteor
    Flashes in the Sky: The Origins of Meteors
  • The Carina nebula in space.
    Exploring the Carina Nebula
  • The Mysterious Moons of Pluto
  • Valentina Tereshkova
    Valentina Tereshkova: The First Woman in Space
  • the constellation centaurus
    Celestial Treasures of the Constellation Centaurus
  • Illustration of the gas giant planet Neptune and its largest moon Triton.
    Learn About Neptune's 14 Moons
  • The constellation Canis Major with its companion Canis Major.
    There's a Starry Pooch in the Sky Named Canis Major
  • Triton, the largest moon of Neptune. The strange terrain along the center of the image is called "cantaloupe terrain". The black smears are nitrogen geysers.
    Exploring Neptune’s Frigid Moon Triton
  • The Whirlpool Galaxy
    Spiral Galaxies
  • Solar flares are often accompanied by a coronal mass ejection.
    How Solar Flares Work
  • sombrero galaxy
    Explore the Sombrero Galaxy
  • hypergiant star
    Is There an Astronomical Explanation for the Star of Bethlehem?
  • An artistic view of material being gravitationally sucked off a a blue supergiant variable star onto a black hole known as Cygnus X-1.
    Solving the Busy Stellar Mystery of Cygnus X-1
  • The green flash most often appears as a thin band of green at the top of a sunrise or sunset.
    The Green Flash Phenomenon and How to See It
  • Bernard A. Harris
    Biography of Dr. Bernard Harris, Jr.
  • A finder chart for the Lyrids.
    The Lyrid Meteor Shower: When It Occurs and How to See It
  • Two Perseid meteors streak across the Milky Way during the 2012 meteor shower in Oklahoma.
    How Meteors Form and What They Are
  • Mystic Mountain in the Carina Nebula
    Are Astronomy, Astrophysics and Astrology All the Same?
  • What are Rotation and Revolution?
  • Seine et Marne. Focus on one of the most beautiful stars of heaven: Vega in the constellation Lyra. The blue star is located 25 light years from Earth and is clearly visible, especially in summer.
    Vega Star Facts on Our Future North Star
  • Hawaii, Mauna Kea Observatory
    Astronomy: The Science of the Cosmos
  • Artwork of a Galaxy as Whirlpool in Space
    Can We Travel Through Time to the Past?
  • Image of the moon's far side
    What's Really on the Far Side of the Moon
  • The timeline of the universe
    How Did the Universe Get Started?
  • massive stars in the peony nebula
    All About Nebulas
  • Star chart of constellations and asterisms
    Understanding Star Patterns and Constellations
  • Nasa artwork of a crew of astronauts on the moon with a rover
    What Happens to the Human Body in a Vacuum?
  • hs-2009-14-a-large_web_galaxy_triplet.jpg
    The Top Space Questions
  • View from a water world
    How Many Habitable Planets are Out There?
  • sound in space
    Can Humans Hear Sound in Space?
  • earth and its seasons
    The Reasons for the Seasons
  • smallerAndromeda.jpg
    What is Blueshift?
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