Stellarium/stellarium
Stellarium is a free GPL software which renders realistic skies in real time with OpenGL. It is available for Linux/Unix, Windows, macOS and Haiku. With Stellarium, you really see what you can see with your eyes, binoculars or a small telescope.
10k stars1.1kforks379issuespushed
Worth your time
rules reportOutside contributors get real replies here, and their work gets merged.
99 of 118outside PRs merged (84%)
checked