Stellarium is a free open source planetarium for your computer. It shows a realistic sky in 3D, just like what you see with the naked eye, binoculars or a telescope. It is being used in planetarium projectors. Just set your coordinates and go.Stellarium Features:sky: default catalog of over 600,000 stars extra catalogs with more than 210 million stars asterisms and illustrations of the constellations images of nebulae (full Messier catalog) realistic Milky Way very realistic atmosphere, sunrise and sunset the planets and their satellites interface: a powerful zoom time control multilingual interface scripting to record and play your own shows fisheye projection for planetarium domes spheric mirror projection for your own dome graphical interface and extensive keyboard control telescope control visualization: equatorial and azimuthal grids star twinkling shooting stars eclipse simulation skinnable landscapes, now with spheric panorama projection customizability: add your own deep sky objects, landscapes, constellation images, scripts...