Expert: Harry Hayfield - 3/2/2007

Question
hi im doing n earth science project about an timeline of the theories on how the solar system was formed if you can help me with this im really very grateful but if you cant i understand please and thank you buh bye

Answer
Over 4.6 billion years ago: The Sun burst into life when it started it's nuclear fusion
4.6 billion years ago: The Earth formed
4.4 billion years ago: Thea (a planet the size of Mars) collided with Earth. Although the two planets fused, the Moon was created as a result and is all that remains of Thea