this post was submitted on 27 Dec 2024
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[–] dragonfucker@lemmy.nz -1 points 5 months ago (1 children)

Forgetting Pluto and Charon, drag sees.

[–] rockerface@lemm.ee 8 points 5 months ago (1 children)

Those are more of a binary planet than a planet and satellite, to be fair. And that's even before we get into the whole planet vs dwarf planet debate.

(For the record, I think Ceres should also count as a planet)

[–] Klear@sh.itjust.works 8 points 5 months ago (1 children)

Ceres is the issue. People are pissed that they learnt the list of planets and now it's different, but don't realise the only viable options were to either drop the last one or add a bunch of them, some right in the middle.

[–] lunarul@lemmy.world 7 points 5 months ago (2 children)

And if Ceres is a planet, shouldn't Eris be one too?

[–] Klear@sh.itjust.works 4 points 5 months ago

Exactly. It would get real messy.

[–] humanspiral@lemmy.ca 3 points 5 months ago (3 children)

What is argument for Ceres and Eris being planets?

[–] deadbeef79000@lemmy.nz 2 points 5 months ago

Hydrostatic equilibrium. Their gravity is enough to pull their mass into a sphere-ish shape.

Contrast to asteroids that are irregular.

[–] rockerface@lemm.ee 2 points 5 months ago

The same as for Pluto

[–] lunarul@lemmy.world 1 points 5 months ago

Large round bodies orbiting the sun.