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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| Umbra 1 |
An area of total shadow, such as the zone on the surface of the Earth from which totality is observed during a solar eclipse.
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