Space
Asteroid Belt Once Shaken Like a Cosmic Snow Globe: CfA Says
Jupiter may have once been as close to the Sun as Mars is now, and as it migrated through the main asteroid belt to its current position, it played a role is nearly wiping the asteroid belt clean, leaving behind only one-tenth of a percent of the original material in the belt but also bringing in material from the far reaches of the solar system, according to a new report from the Harvard-Smithsonian Center for Astrophysics (CfA).
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