Space Background (Animated)
I know with the Kenney Studios we can customize our own planets. Which is also really epic, thank you Kenney <3
But more to the serious side, what is meant with this idea is something like; Planets, Asteroid fields, Nebulas, Stars(Suns), Galaxies.
And to top up the notch if these things were animated, and something like the planets which could be separated into different parts on folded out to a whole plain, so you would could make a neat looking rotation, and differ between clouds and ground.