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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| Algenib Gamma Pegasi; γ Peg |
A B star of magnitude 2.8 that marks one corner of the Square of Pegasus. The Arabic name means the side. The name is also sometimes applied to the star Alpha Persei, more usually known as Mirfak.
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