That's no moon. It's a space station. Well it used to be a moon, now it's a space station.
This is a mod for Grand Theft Auto V. It's genius. Absolute genius. It replaces the moon in the game with a Death Star. A simple modification but damn. How cool would it be to be playing Grand Theft Auto with the overwhelming threat that Planet Earth is just one blast away from complete and utter destruction.
It isn't of course. But it'll be so much easier to pretend when there's a Death Star hanging in the sky where there once was a moon.
The mod isn't quite ready yet, it still needs to be tested, but you can find out more information here.