No, this is not a game I made or have any affiliation with... besides loving it (that's normal... right?)
Anyways, the game is Universe Sandbox. It's a gravitational simulator, with a particle system that delivers awe inspiring results. Look at this screenshot:
It's a picture of andromeda, with the maximum number of particles.
It's a real time sim, and you can launch galaxies towards each other; like this:
If that's too big, you can zoom in to a more familiar level, creating solar systems
Or maybe you just want to see cool, gravity-related formations?
Or any of these things:
There's some really cool stuff in this game. It's at [href]UniverseSandbox.com[/href]
There's a free 1 hour demo, and you can buy it for as little or as much as you want.
Here's a video i made after a couple hours tinkering with it:
http://www.youtube.com/watch?v=2R9vBxVBGw4
and here's a video of two galaxies colliding:
http://www.youtube.com/watch?v=Avy-PTi5e9Y
