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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| Regular Satellite |
A natural satellite of a planet in a direct rather than retrograde orbit of low or moderate eccentricity in the planet’s equatorial plane.
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