A wandering Jupiter helped push an early generation into the sun, new study claims
Earth and its neighbors aren’t the first rocky planets to circle the sun, a new study suggests. Jupiter might have had a hand in flushing an earlier generation of rocky worlds into the sun to their doom, clearing the way for the current planets to form.
A rain of asteroids hurled into the inner solar system by a wandering Jupiter could have swept up a family of large rocky planets huddled up close to the sun, researchers report online March 23 in the Proceedings of the National Academy of Sciences. The planetary cleanse would have left behind a narrow ring of debris out of which Mercury, Venus, Earth and Mars formed. Such a scenario could explain why the solar system stands out from other planet families with its lack of oversized rocky worlds hugging the sun.