His is an idea, inspired by my previous space and satellite launching game, in which you create your very own solar system. This is mainly for the purpose of making some cool screenshots of galaxies that exist only in our minds, but id like to look into being able to do crazy things like downloading other peoples systems and using them as screen savers.
The process is pretty straightforward, You choose your distance from the galactic center, the size of your star, and its speed of rotation then commence dropping planets, moons, and other gravitational bodies into orbit around it. Create binary star systems, See what its like to live on a planet where a black hole is involved, etc.