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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 year ago by to c/science@lemmy.world
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[–] 11 points 1 year ago (4 children)

Be funny if we share an orbit with another Earth that is exactly in sync to stay behind the sun.

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  • [–] 5 points 1 year 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.

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