Earths' long ago

March 23, 2015 11:43 PM

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The researchers were attempting to discover why the solar system is the way it is, including why many planets have low masses, as compared to solar systems elsewhere in the galaxy. They believe several "super-Earths," or planets somewhat larger than Earth, may have previously existed.

"Our work suggests that Jupiter's inward-outward migration could have destroyed a first generation of planets and set the stage for the formation of the mass-depleted terrestrial planets that our solar system has today," said Konstantin Batygin, an assistant professor of planetary science at Caltech...

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