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| User Info | First earth-like planet purportedly discovered; entered at 2011-12-09 17:31:15 | |||
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Bezzle Posts: 15043 Registered: 2009-08-02 
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Quote:It is thought that the Theia impact helped to actually reduce the size of the Earth, thinning the crust and thus allowing for tectonic plate movement (and, of course, this formed the Moon).The earth definitely became more massive because it acquired the iron core of the impacter. A lot of lighter silicate mantle rock was ejected into orbit, and became the moon. 2011-12-09 17:31:15
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