[Utah-astronomy] Sims for cloudy nights

I'm not usually a PC gamer, but the following two spaceflight simulators are just INCREDIBLE. Both of them are also FREE programs. The imagery in these two programs is spectacular. I could keep going with the superlatives about these programs for quite some time. <g> www.orbitersim.com - Space shuttle simulator and more http://www.shatters.net/celestia/ - Spaceflight simulator, solar system to interstellar travel (also for Mac OSX). Now if I could just get them to include relativistic effects. <VBG> This program was featured in S&T about a year ago. Clear skies, Dale.