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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| Vignetting |
The uneven illumination of the image plane in an optical instrument such as a telescope. The usual cause of vignetting is obstruction of the light by parts of the instrument itself.
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