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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| Tail |
The extended part of a comet that grows from the head when the comet is in the vicinity of the Sun.
See also: ion tail, dust tail.
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