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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| W Ursae Majoris Star |
A member of a class of eclipsing variable stars in which the two components are stars of spectral type F or G that are similar in brightness and almost in contact. The primary and secondary minima of the light curve are nearly equal and the periods are typically several hours.
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