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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| Canis Minor The Lesser Dog |
A small constellation bordering the celestial equator and close to Orion. With Canis Major, it is supposed to represent one of the dogs following Orion, and was listed by Ptolemy c. AD 140. It contains only two bright stars, the brightest being Procyon.
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