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Stellarium - Stellarium is a free open source planetarium for your computer.
OpenSpace - OpenSpace is open source interactive data visualization software designed to visualize the entire known universe and portray our ongoing efforts to investigate the cosmos.
WorldWide Telescope - The WorldWide Telescope (WWT) is a Web 2.
Celestia - Real-time 3D visualization of space
Cosmographia - This is an app that will let you explore the Solar System!
Solar System Scope - 3D model of the Solar System and night sky in real time