Stellarium is a remarkable software that allows users to experience realistic skies in real time using OpenGL technology. This free software is compatible with Linux/Unix, Windows, and macOS, making it accessible to a wide range of users. What sets Stellarium apart is its ability to accurately depict what you can observe with your own eyes, binoculars, or even a small telescope. With over 5.7k stars and 726 forks, it has gained significant popularity among users. It operates under the GPL-2.0 license and offers a range of features and activities, making it a valuable tool for astronomy enthusiasts.
https://github.com/Stellarium/stellarium