Taurus is one of the constellations of the zodiac and
is located in the Northern celestial hemisphere. Taurus is a large and
prominent constellation in the northern hemisphere's winter sky. A
number of features exist that are of interest to astronomers. Taurus
hosts two of the nearest open clusters to Earth, the Pleiades and the
Hyades, both of which are visible to the naked eye. At first magnitude,
the red giant Aldebaran is the brightest star in the constellation. In
the northeast part of Taurus is the supernova remnant Messier 1, more
commonly known as the Crab Nebula. One of the closest regions of active
star formation, the Taurus-Auriga complex, crosses into the northern
part of the constellation. The variable star T Tauri is the
prototype of a class of pre-main-sequence stars.