[anusinha]

Really cool.

Also possibly of interest: http://en.wikipedia.org/wiki/Moons_of_Pluto

I had no idea Pluto (not a planet) had five moons.

[waster]

There are even asteroids with moons: http://en.wikipedia.org/wiki/Minor-planet_moon.

Ida and Dactyl are possibly the best-named pair, IMHO.