The official constellation boundaries, as set by Eugène Delporte in 1930, are defined by a polygon of 26 segments.In the equatorial coordinate system, the right ascension coordinates of these borders lie between 03 During November, the Taurid meteor shower appears to radiate from the general direction of this constellation.
Zeta Tauri 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.
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.
To the west, the two horns of the bull are formed by Beta (β) Tauri and Zeta (ζ) Tauri; two star systems that are separated by 8°.
Beta 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.The Pleiades cluster is classified as a Shapley class c and Trumpler class I 3 r n cluster, indicating that it is irregularly shaped and loose, though concentrated at its center and detached from the star field.In the northern part of the constellation to the northwest of the Pleiades lies the Crystal Ball Nebula, known by its catalogue designation of NGC 1514.The seven most prominent stars in this cluster are at least visual magnitude six, and so the cluster is also named the "Seven Sisters".However, many more stars are visible with even a modest telescope.The Beta Taurid meteor shower occurs during the months of June and July in the daytime, and is normally observed using radio techniques.