Curated Tumblr

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For preserving the least toxic and most culturally relevant Tumblr heritage posts.

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Luna (slrpnk.net)

submitted 1 month ago by [email protected] to c/[email protected]

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[–] [email protected] 4 points 1 month ago (2 children)

Charon is still a moon, nobody upgraded it to dwarf planet.

[–] [email protected] 1 points 1 month ago

That seems terribly unfair. Downgrades but no upgrades?

[–] [email protected] 1 points 1 month ago (1 children)

I thought for an object to be a satellite it's orbital point had to be located inside the body of the other entity.

[–] [email protected] 1 points 1 month ago* (last edited 1 month ago)

There's currently no formal definition requiring that. By that definition, none of Pluto's five moons would be moons, since they all orbit the same barycenter.

There's a whole discussion about it here and it looks like it might be reconsidered in the future https://en.wikipedia.org/wiki/Charon_(moon)#Classification