Astronomy is looking up

By Bruce Spence
Updated July 26 2016 - 4:50pm, first published July 25 2016 - 8:22am
Mercury is faint but above and close to Venus on its right, and you can see them all in a clear sky, even without binoculars before twilight ends. See top diagram.
Mercury is faint but above and close to Venus on its right, and you can see them all in a clear sky, even without binoculars before twilight ends. See top diagram.

Moon Origin

Where did the Moon come from? This is not a simple, plain question easy to answer. Mercury and Venus have no moons. We have one, which is large and close to Earth. Mars has a pair of tiny ones, which may be captured asteroids. Jupiter and the outer gas planets have many dozens of Moons of all sizes. 

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