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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| Serpens The Serpent |
One of the 48 constellations listed by Ptolemy c. AD 140 and unique in that it is split into two parts, one either side of Ophiuchus The Serpent Bearer. The two parts are known as Serpens Caput the head and Serpens Cauda the tail. In all, Serpens contains nine stars brighter than fourth magnitude.
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