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Feature Asteroid 2012 DA14 Earth Flyby ...or explore missions and their technology in more detail. Watch Curiosity (MSL) land on Mars, ride with Juno on its way to Jupiter, or learn about the power systems behind Curiosity and other missions.
Welcome to Celestia ... The free space simulation that lets you explore our universe in three dimensions. Celestia runs on Windows, Linux, and Mac OS X. Unlike most planetarium software, Celestia doesn't confine you to the surface of the Earth.
Missions en cours
Observation of the International Space Station The International Space Station can easily be spotted with the naked eye. Because of its size (110m x 100m x 30m) it reflects very much sunlight. The best time to observe the ISS is when it is night time at your location, but the Space Station is sunlit. Such a situation occurs often in the morning before sunrise or in the evening after sunset. Visible passes