Distant exoplanets can easily have habitable moons, as this illustration shows, and soon we’ll be able to find them in real life! David A. Aguilar, CfA photoAt the risk of being pegged as Astronomy’s entertainment reporter, I wonder what you all think about James Cameron’s latest sci-fi epic, Avatar. To those of a certain age, Cameron may be best-known as Mr. Titanic, but he’s also the guy who brought us Aliens, the Terminator movies, and The Abyss. Clearly, the guy knows how to make a movie. An...