Stellarium is a free open source planetarium software for Linux, Mac OS, Windows and web. Using this you can see the realistic sky design in 3D system on your computer. It is released under open source GNU General Public License version 2. It comes with a catalogue of over 177 million stars and 1 million deep-sky objects. It also comes with images of nebulae, realistic Milky Way, atmosphere, sunrise and sunset. And complete set of our planets and their satellites with clear details. Some other features are plugin support, eclipse and supernovae and iridium flares simulation and lot more.