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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| Regulus Alpha Leonis; α Leo |
The brightest star in the constellation Leo. It is a B star of magnitude 1.4; the system is at least triple, the primary having companions of seventh and thirteenth magnitudes. The name is Latin and means little king. Regulus is sometimes known as The Royal Star.
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