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[-] essell@lemmy.world 149 points 10 months ago

I believe that's the same for every planet. And every moon. For every orbit.

Its just that the barycenter is inside the more massive object when one is much more massive than the other. Not that this makes much of a difference to anything.

[-] deadbeef79000@lemmy.nz 64 points 10 months ago* (last edited 10 months ago)

Correct.

I also believe that one of the criteria for a binary planet is that the barycenter is outside either body. Like Pluto/Charon.

[-] mnemonicmonkeys@sh.itjust.works 15 points 10 months ago

Don't forget the other 3 bodies in the Pluto/Charon system

[-] SpaceNoodle@lemmy.world 28 points 10 months ago
[-] 9bananas@feddit.org 12 points 10 months ago

depends! do you wanna know how the system will evolve over long periods of time?

... then yes!

[-] SpaceNoodle@lemmy.world 6 points 10 months ago

So you're saying it's a Three-Body Problem

[-] mnemonicmonkeys@sh.itjust.works 9 points 10 months ago

Technically 5, but yes

[-] panda_abyss@lemmy.ca 6 points 10 months ago* (last edited 10 months ago)

I’ve always preached inclusivity and would welcome 3 more planets

[-] deadbeef79000@lemmy.nz 4 points 10 months ago

I just can't remember their names :-(

[-] mnemonicmonkeys@sh.itjust.works 2 points 10 months ago

Same. That's why I was lazy and didn't even mention them ;)

[-] Denvil@lemmy.ml 2 points 10 months ago

The only one I remember is Styx cause I remember the river from mythology cause I thought it was cool. Not a damn clue what the others were.

[-] deadbeef79000@lemmy.nz 1 points 10 months ago

Oh yeah! Also Nix and Hygea i think.

[-] stevedice@sh.itjust.works 16 points 10 months ago

I mean, sure, but that'd be like saying I'm pulling the earth towards me when I jump.

[-] LifeInMultipleChoice@lemmy.dbzer0.com 31 points 10 months ago

You don't have to jump, you're already doing it. Some of us more than others... *Looks in mirror and hangs head

[-] exasperation@lemmy.dbzer0.com 3 points 10 months ago

Isn't that canceled out by the pushing you do when you start to jump?

[-] stevedice@sh.itjust.works 2 points 10 months ago

Yeah, but then I pull it back as I'm falling.

[-] davidgro@lemmy.world 3 points 10 months ago

If you have ever done a handstand then you have lifted over your head the weight that the entire mass of the earth has in your own gravitational field.

[-] fluffykittycat@slrpnk.net 11 points 10 months ago

Pluto and it's biggest moon Charon about for the very center outside of each other. This means that you could build a space elevator directly between the surface of each of them and it would rotate around that point since they're also tightly locked.

[-] BurgerBaron@piefed.social 3 points 10 months ago

Asteroids everything does to some degree even if miniscule I'd assume.

this post was submitted on 03 Sep 2025
814 points (98.5% liked)

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