There is no established lower limit on what is considered a "moon". Every natural celestial body with an identified orbit around a planet of the Solar System, some as small as a kilometer across, has been considered a moon, though objects a tenth that size within Saturn's rings, which have not been directly observed, have been called moonlets. Small asteroid moons (natural satellites of asteroids), such as Dactyl, have also been called moonlets.
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FundMECFS - 1mon
Yeah I agree. Our moon is one of the largest in the solar system, and it feels like the moon count for the solar system is inflated due to some that are well pretty small.
paulhammond5155 in space
New Moon Discovered Orbiting Uranus Using NASA’s Webb Telescope
https://science.nasa.gov/blogs/webb/2025/08/19/new-moon-discovered-orbiting-uranus-using-nasas-webb-telescope/One 10 kms in diameter.
At what size does it stop being considered a moon and start being considered space debris?
I find it rather ridiculous that pluto isn't a planet but this is a moon.
“dwarf moon” in 3… 2…
Saturn: laughs nervously
Apparently there is no established size requirement
Yeah I agree. Our moon is one of the largest in the solar system, and it feels like the moon count for the solar system is inflated due to some that are well pretty small.
Um…Pluto’s a planet!
Miranda on https://assets.science.nasa.gov/dynamicimage/assets/science/missions/webb/blog/2025/webb-STScI-01K22B5K79SJG3QHRTGTZ403K4-1K.jpg?w=1140&h=1140&fit=clip&crop=faces%2Cfocalpoint looks like Dark Bramble from Outer Wilds ngl
spooky
:)
Where's the space bidet when ya need it?
Moon named finger
🙏
Since when does uranus got them nice rings
Why are they so interested in my anus?
Maybe they're looking for the Klingons?
Those dingleberries?!