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submitted 4 weeks ago by fossilesque@mander.xyz to c/science_memes@mander.xyz

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https://en.wikipedia.org/wiki/Barycenter_(astronomy)

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[-] essell@lemmy.world 142 points 4 weeks 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 63 points 4 weeks ago* (last edited 4 weeks 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 12 points 4 weeks ago

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

[-] SpaceNoodle@lemmy.world 27 points 4 weeks ago

Is that a problem?

[-] 9bananas@feddit.org 11 points 4 weeks ago

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

... then yes!

[-] SpaceNoodle@lemmy.world 6 points 4 weeks ago

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

[-] mnemonicmonkeys@sh.itjust.works 9 points 4 weeks ago

Technically 5, but yes

[-] panda_abyss@lemmy.ca 6 points 4 weeks ago* (last edited 4 weeks ago)

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

[-] deadbeef79000@lemmy.nz 4 points 4 weeks ago

I just can't remember their names :-(

[-] Denvil@lemmy.ml 2 points 3 weeks 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 3 weeks ago

Oh yeah! Also Nix and Hygea i think.

[-] mnemonicmonkeys@sh.itjust.works 2 points 3 weeks ago

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

[-] stevedice@sh.itjust.works 17 points 4 weeks 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 4 weeks 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 4 weeks ago

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

[-] stevedice@sh.itjust.works 2 points 3 weeks ago

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

[-] davidgro@lemmy.world 3 points 3 weeks 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 4 weeks 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.