this post was submitted on 21 Nov 2024
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Science Memes

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[–] superkret@feddit.org 17 points 19 hours ago (3 children)

How can we even know it's a planet when we haven't observed a single orbit, yet?
Maybe it's just a really big comet.

[–] Gladaed@feddit.org 2 points 22 minutes ago

It's not really big. There are multiple Pluto like planetoids. Also there is a hunk of rock in the asteroid belt youcould name a planet.

[–] KSPAtlas@sopuli.xyz 2 points 1 hour ago

By measuring how fast it's moving and where it is you can find the orbit

[–] deadbeef79000@lemmy.nz 19 points 16 hours ago (1 children)

We've observed enough of its orbit to know what shape it is.

[–] NeatoBuilds@mander.xyz 14 points 15 hours ago (1 children)

How can you be so sure it doesn't just decide to leave

[–] MintyFresh@lemmy.world 7 points 10 hours ago

And who could blame it?