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This is a free space exploration simulation program. It must be downloaded from the website and it runs on Mac, Windows, and Linux Operating Systems. Celestia provides the students with a satellite imagery and the students can zoom in on the earth, moons, the stars, and other planets, and have a great time learning more about space. The program is very easy to use and navigate. This free program is available in various languages to cater better to a larger pool of students.