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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| Satellite Galaxy |
A dwarf galaxy in orbit around a larger one. A number of satellite galaxies accompany our own Milky Way Galaxy and the Andromeda Galaxy in the Local Group.
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