20 Apr 2015
Richard A. Lovett
Some scientists are convinced more planets exist in our Solar System
New horizons nears Pluto, Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute
Not many years ago, the idea our Solar System might contain undiscovered planets beyond Pluto would have been considered science fiction. But now, with NASA’s New Horizons spacecraft three months away from giving us our first close-up view of Pluto, astronomers are beginning to wonder. The more we study the dwarf planet and its surrounds, the less lonely it appears. Are there as-yet undiscovered worlds on the far edge of the Solar System?
Some astronomers are beginning to believe there could be hundreds, or even a thousand distant bodies lurking out there – not only undiscovered Plutos, but perhaps even larger bodies, so distant our best telescopes have yet to spot them.
We already know Pluto isn’t entirely alone…
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