Zeta Tauri (ζ Tau, ζ Tauri) is a binary star in the zodiac constellation Taurus, the Bull. It has an apparent visual magnitude of 3.0, which is bright enough to be seen with the naked eye. Parallax measurements place it at a distance of roughly 440 light-years from the Earth.
In Chinese astronomy, Zeta Tauri is called 天關, Pinyin: Tiānguān, meaning Celestial Gate, because this star is marking itself and stand alone in Celestial Gate asterism, Net (mansion) (see : Chinese constellation). 天關 (Tiānguān) is westernized into Tien Kwan, but the name Tien Kwan was designated not only for Zeta Tauri, but also for the stars near by, with the meaning is "the Heavenly Gate"
Read more about Zeta Tauri: Properties