PDA

View Full Version : Spacecraft Searching for Remains of Mystery Planet



Fraser
2009-Apr-10, 02:10 PM
How did our Moon form? The leading hypothesis, the Giant Impact Theory, proposes that in the formative years of the Solar System, a Mars-sized protoplanet crashed into Earth. Debris from the collision, a mixture of material from both bodies, spun out into Earth orbit and coalesced into the Moon. Soon, this theory will [...]

More... (http://www.universetoday.com/2009/04/10/spacecraft-searching-for-remains-of-mystery-planet/)