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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| Catalogue Equinox |
The intersection of the hour circle of zero right ascension of a particular catalogue with the celestial equator.
See also: dynamical equinox, equinox.
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