Taurus (constellation) is a white, spectral class B7 III giant star known as "El Nath", which comes from the Arabic phrase "the butting", as in butting by the horns of the bull. At magnitude 1.65, it is the second brightest star in the constellation, and shares the border with the neighboring constellation of Auriga. As a result, it also bears the designation Gamma Aurigae. Zeta Tauri (the proper name is "Tianguan") is an eclipsing binary star that completes an orbit every 133 days. A degree to the northwest of ζ Tauri is the Crab Nebula (M1), a supernova remnant. This expanding nebula
Auriga (constellation) Aurigae (Menkalinan, Menkarlina) is a bright A2IV class star (A-type subgiant). Its Arabic name comes from the phrase "mankib dhu al-'inan", meaning "shoulder of the charioteer" and is a reference to Beta Aurigae's location in the constellation. Menkalinan is 81 light-years away and has a magnitude of 1.90. Like Epsilon Aurigae, it is an eclipsing binary star that varies in magnitude by 0.1. The two components are blue-white stars that have a period of 3.96 days. Its double nature was revealed spectroscopically in 1890 by Antonia Maury, making it the second spectroscopic binary discovered, and its variable nature was discovered