I'm not sure if this just a problem that I'm having or not, but it seems to me that the current version of Universe Sandbox 2 is very inefficient in its usage of CPU and GPU. No matter what I am doing in-game, the program is constantly using more than 40% of my available CPU (quad-core). Despite this massive consumption of resources, I am unable to run the basic Solar system simulation (low quality settings) at any higher than 7 fps. Even during collisions between relatively small objects (eg. Pluto & Ceres), I get terrible frame-rate. Also, however I am not as surprised by this, when I try to do anything with galaxies, my game crashes and I have to restart. I doubt that this is a hardware related problem, as I am able to run other very CPU intensive games at their highest setting without incident.