Daily Extra :
Astronomy & Space Word of The Day
orbital resonance: A relationship in which the orbital period of one body is related to that of another by a simple integer fraction.
Who Was Born Today?:
1948: Eleanor Margaret Burbridge, astronomer and educator
Who Died Today?:
1952: Bernard F Lyot, French astronomer (chronograph, Lyot-filter), age 55
Today in History:
1845: H L Fizeau and J Leon Foucault take 1st photo of Sun
1958: National Advisory Council on Aeronautics renamed NASA
1963: Luna 4 - USSR Lunar Probe launched. Lunar 4 was intended to be a lunar lander but missed the Moon. It is now in an Earth Moon orbit.
1964: Zond 1 - USSR Venus Flyby launched. Communication lost en route; now in a solar orbit.
1966: Soviet Union's Luna 10 becomes 1st spacecraft to orbit Moon
1992: Space Shuttle STS-45, Atlantis 11, lands