Where the Planets Are In the beginning, the Earth was believed to be both flat and at the center of the universe. Then a sailor set sail to prove that the Earth is in fact round. Decades later science proved that the churches were wrong and in fact the Earth orbited around the Sun not the other way around. Now it is commonly known that the solar system that the human race lives in is …showed first 75 words of 710 total…

…showed last 75 words of 710 total…Shoemaker-Levy 9 comet had hit a planet that did not have the mass to absorb the repeated impacts it would have changed the target planet's orbit thereby changing the orbit of every other planet in the solar system. With this in mind, "one thing is certain: the idea that planets can change their orbits dramatically is here to stay." (Migrating) References: Malhotra, Renu. "Migration Planets." Scientific American. Sept 1999. 25 Aug 1999. <http://www.sciam.com/1999/0999issue/0999malhotra.html>