Scientists @Caltech may have discovered a new planet. Learn more about #Planet9 here: https://t.co/SW0IOaUenk http://pic.twitter.com/RhFK56XLCd
— SPACE.com (@SPACEdotcom) January 20, 2016
via Twitter https://twitter.com/SPACEdotcom
January 21, 2016 at 12:02AM
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