Space exploration began with the launch of Sputnik and Astrophysics was born as the application of physics to the phenomena observed by Astronomy, which etymologically means laws of the stars.
There are 2759 entries in this glossary.| Term | Definition |
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| Deimos |
One of the two small satellites of Mars, discovered in 1877 by Asaph Hall. Images obtained by the Viking 2 Mars mission show a heavily cratered surface. The low albedo and properties of the surface suggest that both satellites have a composition similar to that of the carbonaceous chondrite meteorites, and it has been suggested that they are captured asteroids.
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