Stellarium

Stellarium is a free GPL program that generates a realistic, real-time image of the sky using openGL. It lets you see what you can see in the sky with the naked eye, binoculars or a small telescope. This program can also be used in planetariums.

Observing Capabilities

• The planets of the solar system and their natural satellites;
• All Messier objects;
• All NGC;
• Orbits of the planets;
• The sides of the world;
• Azimuthal grid;
• Equatorial Grid;
• Ecliptic;
• Equatorial line;
• Noon line;
• Scaling the moon;
• Object traces;
• Constellations and names of constellations;
• Constellation boundaries;
• Compensation of the time of light propagation;
• Equatorial/azimuthal mount;
• Field of View;
• Disk viewing window;
• Observation from other planets and the solar system.
• All stars from the Hipparcos catalog.