Stellarium
Software
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Stellarium is a free and open-source planetarium, licensed under the terms of the GNU General Public License version 2 or any later version, available for Linux, Windows, and macOS. Wikipedia
Initial release date: July 2002
Default location: Paris, France
Developer(s): Alexander Wolf; Georg Zotti; Marcos Cardinot; Guillaume Chéreau; Bogdan Marinov; Timothy Reaves; Florian Schaukowitsch
License: GNU GPLv2
Original author(s): Fabien Chéreau
Platform: PC, Mobile