Taurus (constellation) 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 northwest 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. Taurus is a big and prominent constellation in
Cancer (constellation) as a lobster. Richard Allen, in "Star-names and Their Meanings", lists names for the constellation as follows: In Ancient Greece, Aratus called the crab "Καρκινος" ("Karkinos"), which was followed by Hipparchus and Ptolemy. The Alfonsine tables called it "Carcinus", a Latinized form of the Greek word. Eratosthenes extended this as "Καρκινος", "Ονοι", "και Φατνη" ("Karkinos", "Onoi", "kai Fatne"): the Crab, Asses, and Crib. In Ancient Rome, Manilius and Ovid called the constellation "Litoreus" (shore-inhabiting). "Astacus" and "Cammarus" appear in various classic writers, while it is called "Nepa" in Cicero's "De Finibus" and the works of Columella, Plautus, and Varro; all