Planetarium

Sky Map (formerly Google Sky Map, open sourced in 2012) - GitHub - sky-map-team/stardroid: Sky Map (formerly Google Sky Map, open sourced in 2012)

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Stellarium Web is a planetarium running in your web browser. It shows a realistic star map, just like what you see with the naked eye, binoculars or a telescope.

Stellarium is a planetarium software that shows exactly what you see when you look up at the stars. It's easy to use, and free.