Night Night Moon

“NASA's GRAIL Mission: Studying the Moon from Crust to Core

By JEFFREY KLUGER Tuesday, Sept. 13, 2011

You can get as poetic about the moon as you want — and everyone from lovers to lyricists to astronauts has had a go at it. But the fact is, the thing's a lump — beautiful, to be sure, but a lump all the same, created more than 4 billion years ago when a Mars-size planetesimal whizzed by, collided with Earth and blasted out a mass of molten debris that eventually cooled into the moon.

Read more: http://www.time.com/...3097,00.html#ixzz1XsvE6oh1”