The Stellarium application 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 is the popular Stellarium astronomy program, so you can take your astronomical viewing settings with you. It has all the same great features as Stellarium including constellation drawing, star names, planet viewing, nebulae watching, and more. Plus, it leaves no personal information behind on the machine you run it on, so you can take your favorite astronomy program with you wherever you go.