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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| Extinction |
The reduction in intensity of light as it passes through an absorbing or scattering medium, such as interstellar material or a planetary atmosphere.
See also: atmospheric extinction, interstellar extinction.
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