Starry Night Astronomy Screensaver Win/Mac Witness the magnificent night sky with this animated screensaver collection Hitchhike on a comet as it streaks past incredible 3-D planets Hop off at Mars for the breaking red dawn or at Pluto in perpetual twilight Tour space-scapes; view latest imagery from Hubble and Spitzer telescopes Speed through the universe on 50+ voyages of breathtaking galaxies and more