Open-source and currently in use by planetarium projectors, cross-platform Stellarium brings astronomer-level features to stargazers of all levels of interest. It's not quite as robust as its competitors, but it's also a much faster program. It doesn't suck away your RAM into a black hole when loading or running. Be aware that it only runs in full-screen mode, making any other programs you're running inaccessible except for the ALT-Tab switcher.
The default catalog includes 600,000 stars, with upgrade modules that can push that up to 210 million stars. The constellations of 10 different cultures are … Read more