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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| Objective Grating |
A diffraction grating, of the transmission type, placed over the aperture of a telescope in order to produce spectra of all the stars in the field of view.
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