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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. Features include: sky - default catalogue of over 600,000 stars - extra catalogues with more than 210 million stars - asterisms and illustrations of the constellations - constellations for ten different cultures - images of nebulae (full Messier catalogue) - 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 visualisation - equatorial and azimuthal grids - star twinkling - shooting stars - eclipse simulation - skinnable landscapes, now with spheric panorama projection customisability - add your own deep sky objects, landscapes, constellation images, scripts...