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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| Late-Type Star |
A relatively cool star, such as one of spectral type K or M. The nomenclature is misleading, dating from a time when the main sequence of the Hertzsprung-Russell diagram was thought to be an evolutionary track. It is, nevertheless, still in widespread use. Hot stars are described as early in this nomenclature.
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