You can align them, scatter them, and set a date you wish to view them at. You can turn the dwarf planets on/off by going to the options menu. Also press c to watch rocks hit the planets or the sun. S: scatter A: align O: options H: help M:meteorite C: comet
thanks to @jw-32646 for inspiration! Check out "frequently asked questions about the universe" by Jorge Cham and Daniel Whiteson, where I also got inspiration!