Astronomers now have the dumbest possible name for a moon that's the moon of another moon

If you gaze up at the night sky there's a good chance you'll spot Earth's only large natural satellite. We just called it "the Moon," but other planets have moons too. Recently, the first evidence of an exomoon -- that is, a moon orbiting a planet in another star system -- was revealed, but what if we found a planet with a moon that had a moon of its own? This entirely speculative scenario has captured the interest of several astronomers who have taken it upon themselves to come up with their ow...