25 Sep '11, 8am

Did our solar system once harbor an extra planet?

Did our solar system once harbor an extra planet?

David Nesvorny from Colorado’s Southwest Research Institute reached the conclusion after performing around 6,000 computer simulations about the formation of the solar system, nearly all of which required the extra planet to work. Almost all of the simulations that factored in only the planets currently occupying our solar system showed the four gas giants violently destroying one another. In the few simulations where they survived, several of the rocky planets, such as Earth, were destroyed instead.

Full article: http://www.mnn.com/earth-matters/space/stories/did-our-so...

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