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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| Waning |
The part of the cycle of the Moon’s phases when the illuminated fraction of the visible disc is decreasing. The opposite is waxing.
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