Space Engine is a freeware simulator that like Celestia allows you to cruise around the universe. Unlike Celestia, it contains numerous planets(including ones with life) that are completely imagined. You can watch also the sky from the surface of the planets and observe skyline on worlds where there are clusters of stars attracted to black holes, Galaxies in the night, or other amazing sights. Sometimes I like to put on ambient space music and just travel across the universe searching for planets with life, or strange solar system. Space Engine also gives you an excellent way of obtaining wallpapers ;) Or ideas for scenery on planets across Pandora Gates ;) Here are some images [img=350x350]http://qualityanimu.files.wordpress.com/2011/08/scr00000.jpg[/img] [img=350x350]http://i54.tinypic.com/10p7up1.png[/img] [img=350x350]http://meta.filesmelt.com/downloader.php?file=SpaceEngine_2011-04-09_16-... [img=350x350]http://meta.filesmelt.com/downloader.php?file=SpaceEngine_2011-04-09_17-... [img=350x350]http://applesforgeeks.com/wp-content/uploads/2011/04/scr00000.jpg[/img] And here is the game: http://en.spaceengine.org/