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'Planet Y' theory hints at hidden Earth-size world lurking in the solar system — and it could be much closer to us than 'Planet Nine' (www.livescience.com)

submitted 1 week ago by RegularJoe@lemmy.world to c/science@lemmy.world

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[–] Wolf314159@startrek.website 5 points 1 week ago

That would be quite a surprising find indeed. I'm pretty sure that we would have already observed the gravitational effects of such a planet though. The Planet X and Planet Y the article refers to are out on the fringes of the solar system with Pluto, which is still pretty neat I think.