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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| Elfir |
Abbreviation for extremely luminous far-infrared sources. These are objects that are ten or a hundred times more luminous in infrared radiation than in visible light.
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