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Fifth Giant Planet was Ejected from the Solar System
Jumpin' Jupiter: The solar system's largest planet may well have knocked another giant into deep space
The consensus among astronomers is that the solar system has always had four giant planets – Jupiter, Saturn, Neptune and Uranus. But now it’s claimed that it’s much more likely to have been home to a mystery fifth giant planet that got knocked out.
Computer simulations by David Nesvorny...
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