Floating pile of rubble a pristine record of solar system's history

A small, near-Earth asteroid named Itokawa is just a pile of floating rubble, probably created from the breakup of an ancient planet, according to a University of Michigan researcher was part of the Japanese space mission Hayabusa.

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<p><a href="http://www.physorg.com/news68391879.html">Floating pile of rubble a pristine record of solar system's history</a></p> <p>A small, near-Earth asteroid named Itokawa is just a pile of floating rubble, probably created from the breakup of an ancient planet, according to a University of Michigan researcher was part of the Japanese space mission Hayabusa.</p>