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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| Pele |
An eruptive centre on Io. A large plume was seen by Voyager 1 in March 1979, but activity had ceased by the time of the Voyager 2 encounter, four months later.
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