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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| Taurus The Bull |
A conspicuous zodiacal constellation, supposedly representing the head and forequarters of a bull. It was listed by Ptolemy c. AD 140 and is possibly one of the most ancient of constellations. The brightest star is the first magnitude Aldebaran, which appears to belong the Hyades cluster, though it is in fact in the foreground. In total, there are fourteen stars brighter than fourth magnitude. The Pleiades cluster and the Crab Nebula also lie within the boundaries of Taurus.
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