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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| Alcyone Eta Tauri; η Tau |
The brightest member of the Pleiades star cluster in the constellation Taurus. The name is that of the daughter of Atlas and Pleione in Greek mythology. Alcyone is a B star of magnitude 2.9.
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