Jupiters Migration and its Influence to Solar System

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Jupiter, the giant planet, roamed toward the center of the solar system and back out again, at one point moving in about as close as Mars is now.New details, which are based on a new model of the early solar system developed by an international team that includes NASA’s Goddard Space Flight Center in Greenbelt, Md, showed that Jupiter’s travels profoundly influenced the solar system, changing the nature of the asteroid belt and making Mars smaller than it should have been. According to a new model Jupiter and Saturn could drift around in the early Solar System when gas was still present, and in some cases could move inside and then back outside to roughly their current locations. 
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Kevin J. Walsh, leader of the new study, think that If Jupiter had moved inside from its birth place down to 1.5 AU from the sun and then had turned around because of the formation of Saturn, eventually migrating outside toward its current location, it would have truncated the distribution of solids in the inner solar system at about 1 AU, which is necessary to explain the small mass of Mars.Now Jupiter orbits the sun at 5.2 AU nearly 483.7 million miles (778.4 million km).The simulations aslo showed that the migration of Jupiter was consistent with the existence of the asteroid belt. Scientists can find out that the asteroid belt has rocky objects from the inner Solar System and icy objects from the outer Solar System.