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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| Absorption Spectrum |
A spectrum produced when electromagnetic radiation is absorbed. When radiation from a hot source passes through cooler matter, radiation at certain wavelengths is absorbed, proucing dark absorption lines and bands.
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