Our Moon makes Earth a more livable planet by moderating our
home planet's wobble on its axis, leading to a relatively stable
climate, and creating a rhythm that has guided humans for
thousands of years. The Moon was likely formed after a Mars-
sized body collided with Earth and the debris formed into the
most prominent feature in our night sky. Featured Mission: GRAIL
The Gravity Recovery And Interior Laboratory (GRAIL) mission
will create the most accurate gravitational map of the Moon to
date, improving our knowledge of near-side gravity by 100 times
and of far-side gravity by 1000 times. Read More About Earth's
Moon