http://sciencenews.org/view/generic/id/63994/title/Why_Mars_is_a_lightweight
By: Ron Cowen
October fourth, 2010
Mars is not as heavy as Earth and Venus. It is also five to ten times as big as it actually is. When the embryo is stranded it can get as big as Mars. The embryos got closer and closer to the sun and came so close that there was no gap. Mars has more than enough material until Jupiter came and brought gas and it spiraled in towards the sun.
I think that the article was very interesting. It had a lot of information in it. However I think it was written for people a bit older because some of it was a bit confusing. I do not really know what embryo is. I think that you need to read the article more than once to understand it. What do they mean when they say that Mars is five to ten times as big as it really is.
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