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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| Syzygy |
The rough alignment of the Sun, Earth and Moon, or the Sun, Earth and another planet. Syzygy thus describes both conjunction and opposition.
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