"Is it true that scientists at NASA are looking for life on the moons of Jupiter?"
Content with the tag: “accretion”
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Final Stages of Earth, Moon, Mars Formation
Credit: Don Davis/NASAA new study in a recent issue of Science from NAI’s NASA Goddard Space Flight Center Team and their colleagues looks at late accretion in the formation of the Earth, Moon, and Mars. Puzzled by the presence of highly siderophile elements (HSUs) in the terrestrial, lunar, and martian mantles, they show that the bombardment by leftover planetesimal populations dominated by massive projectiles can explain these additions. Their inferred size distribution matches those derived from the inner asteroid belt, ancient martian impact basins, and planetary accretion models. The largest late terrestrial impactors, at...
January 11, 2011 / Posted by: Daniella Scalice
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