ASTR 114 Lecture Notes - Lecture 3: Luna 3, Luna 1, Luna 2
1 Feb 2017
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First spacecraft to fly past moon: luna 1 (january 4, 1959) First spacecraft to crash land on moon: luna 2 (september 14, 1959) First pictures of the far side of moon: luna 3 (october 6, 1959) The united states is, so far, the only country to send people to the moon: First person on moon: apollo 11 (july 16, 1969) Last person on moon: apollo 17 (december 7 1972) Apollo 13 was the only manned mission failure, because of an oxygen tank explosion on route to the moon. The crew was sent back to earth successfully. Lu(cid:374)ar phases are due to the moo(cid:374)"s (cid:1006)7. (cid:1007)-day orbit around earth. At any time, half of the moon is illuminated by the sun and half is dark. We see a changing combination of the bright and dark sides as the moon orbits us. Synodic month: the amount of time it takes the moon to go through a whole cycle of phases 29. 5 days.
