Your guide to the universe. Celestia: Home. Dynamic Earth Excerpt: Viz Challenge Winner. Goddard Scientific Visualization Studio. Star Eater - Graphic: Perceiving the Invisible. 100,000 Stars. Current Local Time, Sunrise, Sunset, Moonrise, Moonset Time of World Cities- World-TimeDate.com. Why is it Dark at Night? 50-years-exploration-huge.jpg 3 861×1 706 pixels. Planetarium - Interactive star map and virtual sky. The Largest Black Holes in the Universe. Radicalcartography. Interactive night sky map - AstroViewer. NASA/JPL Solar System Simulator. Scale of the Universe 2012. Chromoscope - View the Universe in different wavelengths. Orrery. Solar System Scope.