Stars 3 Screensaver
This screensaver simulates a flight through the space, full of stars and interstellar gas clouds. Very realistic model (except over light flight speeds), detailed simulation, perfect graphics.
http://www.soft2d.com/graphics_&_m...ensavers/files/stars3ss_setup.exe - 2Mb - Download - Screenshot

Jupiter 3D Space Tour
Fascinating 3D animated space flight near the largest planet within the solar system - Jupiter. Enormous "gas giant" planet is 315 times more massive than Earth. Jupiter deserve to term it a "failed star", although it would need to be some heavier to become a Second Sun. ... Jupiter is perpetually covered with mighty layer of clouds, and biggest tornados of the Earth are nothing in comparison with giant storms permanently raging on this planet. ... Careful and realistic atmospheric animation is one of main features of this screensaver.
http://www.fpsoftlab.com/jupiter3d.exe - 3Mb - Download - Screenshot