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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| Hyperion |
A satellite of Saturn, discovered in 1848 by W. C. Bond. It is an elongated irregular body measuring approximately 350 × 200 kilometres. There are large craters and a curving scarp-like feature, apparently 300 kilometres long. The evidence suggests that it may be a remnant of a larger body shattered by an impact.
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