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Jupiter Moved Inward to its Present Orbit

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Jupiter may have started its life as an icy asteroid, about four times farther from the Sun than its current position in the solar system. A new computer study suggests that it gathered its collection as co-orbital Trojan asteroids, and and the hydrogen gas that makes up the bulk of the planet as it spiraled inward toward the Sun, starting about 4 &1/2 billion years ago. 

The problems connected with a gas giant planet forming near the Sun, where the star's influence would make this very improbable, are neatly avoided. This new scenario also explains why the leading group of Trojan asteroids is much larger than the trailing one.

Please see the linked article below, for further information:


Edited by bison
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