exomoon

From exo- +‎ moon.

exomoon (plural exomoons)

1. (astronomy) A moon that is outside the Solar System (our solar system).
   • 2001 July 14, Robert Casey, “Moons around "hot Jupiter" exoplanets, possible?”, in sci.astro.research‎^[1] (Usenet), retrieved 20 March 2019, message-ID <[email protected]>:

     Of course we can't detect exomoons now (or for a long while), but could planets like 51 Peg b have any moons? Wouldn't the star strip them off? I don't suppose there can be a moon around a planet that orbits in more time than it takes that planet to orbit its star.

   • 2006 August 27, Jens Egon Nyborg, “Re: It's official--Jupiter is now a dwarf planet!”, in rec.arts.sf.written,rec.arts.sf.science‎^[2] (Usenet), retrieved 20 March 2019, message-ID <[email protected]>:

     Now we get exoplanets, dwarf planets, rogue planets, and (exo)moons. That's ok, but then comes the utter silliness: none of them are planets. Even those bigger than Jupiter aren't planets.

• extrasolar moon
• exosolar moon

• exomoonologist
• exomoonology

• exoplanet
• exocomet
• exozodiacal