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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| Instability Strip |
A region of the Hertzsprung-Russell diagram occupied by pulsating variable stars. The strip delineates combinations of luminosity and temperature corresponding to unstable states that result in regular pulsations of a star’s outer layers.
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