Earth had two moons, scientists claim - Telegraph.co.uk

Prof Asphaug told the Sunday Times he believes the landscape of the moon, which appears to have mountains, are the remains of Earth's smaller moon when the pair collided. The moon's smaller twin is believed to have been about onethirtieth of the size. The Earth and its moon are thought to have been formed between 30 million and 130 million years after the birth of the solar system, about 4.6 billion years ago. A total of nine 'super-Earths', planets between one and 10 times the mass of Earth. have previously been found. Scientists from Harvard put forward a theory last year that suggested the Moon was once part of Earth that spun off after they collided with another body. The study was published in journal Science. Last month astronomers reported discovered three planets, similar to Earth, orbiting around a single star which may be able to support life. Researchers estimate there could be as many as 100 billion planets similar to the Earth in our galaxy, the Milky Way. via Science - Google News http://news.google.com/news/url?sa=t&fd=R&usg=AFQjCNH904c0eNNewU74GfbgXc5mwDuMww&url=http://www.telegraph.co.uk/science/space/10165036/Earth-had-two-moons-scientists-claim.html

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