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Stellarium provides you with accurate night sky data that can be used by both professional and amateur astronomers. In fact, this is a planetarium for your computer. The application shows a realistic sky in 3D; just like what you see in a telescope.

Key features include:

• Default catalog of over 600,000 stars (additional catalogs with over 210 million stars).
• Asterisms and constellation illustrations.
• Constellations for 20+ different cultures.
• Images of nebulae (complete Messier catalogue).
• Planets and their satellites.
• Very realistic atmosphere, sunrise and sunset.
• Realistic Milky Way.

Stellarium has a great interface that users of all levels can access. It comes with powerful zoom function, time control, fisheye projection for planetarium domes, advanced keyboard control and telescope control. Stellarium also comes with plugin management so you can add features such as artificial satellites, simulated eye, and telescope configuration. You can also add new Solar System objects to your database from Internet resources.

Looking for a Mac version of Stellarium? Download here