moonmoon

plural moonmoons · alternative moon-moon · alternative moon moon

1. InternetastronomyA moon that orbits a larger moon.

   Sarah Laskow at Atlas Obscura explains that moonmoon is catching on because there’s something pleasing about “recursive places,” like islands within islands, volcanoes within volcanoes and rivers running through a sea.

   2018 October 11, Jason Daley, “If a Moon Has a Moon, Is Its Moon Called a Moonmoon?”, in Smithsonian

   Synonyms: moonette, moonito, sub-moon, submoon