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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| Delphinus The Dolphin |
A small faint but distinctive constellation lying in the Milky Way just north of the celestial equator. It is one of the constellations listed by Ptolemy c. AD 140.
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