this post was submitted on 14 Oct 2025
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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 5 days ago by RegularJoe@lemmy.world to c/science@lemmy.world
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[–] Blackmist@feddit.uk 11 points 4 days 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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