Researchers: Solar system may have Planet X , Planet Y

January 18, 2015 2:55 AM

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The presence of two additional planets might explain the unexpected orbital features of some trans-Neptunian objects.

Scientists have postulated the existence of possibly two undiscovered planets beyond the orbit of Neptune to explain discrepancies in the orbits of extreme trans-Neptunian objects (ETNO). The objects have orbits that take them beyond the orbit of the planet Neptune.

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