Can moons have moons?The idea of a moon’s moon (not to be confused with a man’s man) has a few strikes against it. The first strike? Gravity. Moons are held in check by the gravitational pull of their parent planet. If a moon can’t control its own behavior, how is it going to control the behavior of a pet satellite? (God, I felt like such a parent when I just wrote that.) And that assumes…
READ THE REST HERE: http://is.gd/hBgysR
Image credit: NASA Planetary Photojournal

Can moons have moons?
The idea of a moon’s moon (not to be confused with a man’s man) has a few strikes against it. The first strike? Gravity. Moons are held in check by the gravitational pull of their parent planet. If a moon can’t control its own behavior, how is it going to control the behavior of a pet satellite? (God, I felt like such a parent when I just wrote that.) And that assumes…

READ THE REST HERE: http://is.gd/hBgysR

Image credit: NASA Planetary Photojournal