User blog comment:BenRG/The Shattered Moon/@comment-10390252-20130920184148

Here's a new thought on this subject: In episode 10, the damaged side of the Moon was seen on the opposite limb (side) than previously shown in every single case. This suggests to me that the Moon itself isn't damaged. What we're seeing is a cluster of enormous asteroids... I'm talking city-sized object here at the very smallest, that is orbiting the Moon in synchronicity with its terminator (the division between day and night).

It might be interesting to learn the origin of those asteroids; if the orbit is long-term stable then they may have been there for many millennia and might be a possible target for exploration and exploitation. However, if they're recent arrivals, their orbit might be unstable; they could hit the Moon... or they could hit Vytal. Look up 'Extinction-Level Event' for more details.

That aside, the Moon itself seems to be orbiting Vytal quite fast. It's seen as a waning crescent at the end of Episode 8 and, by the end of Episode 10 (one in-universe day later), it is waxing gibbous, almost full. For that to be possible, it must be in a very, very tight orbit around Vytal - maybe an orbital period of less than a week. This would have two obvious consequences:

1) The tides on Vytal would be enormous and there would probably be pretty powerful storms as the Moon's gravitational pull yanks anything not solid around the planet every orbital period;

2) The Moon is about the same size in the sky as Earth's moon and yet is evidently a lot closer in; so it is probably much smaller than our Moon.  It might not even be large enough to be pulled into a spheroid shape by its own gravity.  Oddly enough, this means that it may be a captured asteroid itself... or it could be artificial.