The dust grains that eventually coalesced into our solar system's planets bounced around like pinballs over vast distances nearly 4.6 billion years ago, a new meteorite study suggests.
Scientists studying a tiny chunk of a meteorite say it likely formed close to the sun, was ejected near today's asteroid belt and then returned to the scorching inner reaches thereafter. The results should help astronomers better understand the early days of our solar system, and could shed light on planet-formation processes in general, researchers said.
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