Extrasolar moons may provide first glimpse of habitable worlds -- Thursday, October 11, 2012 -- [snip] Researchers believe imaging extrasolar moons (exomoons) could offer unprecedented clues to their ability to support life by providing the chemical signatures carried in their light. [/snip]
Exxon moons? Great. Now they own moons. Probably building convenience stores there for the Martians.
They mean “surface” habitability apparently.
All moons are habitable if people want to live there.