Izar (Epsilon Boötis) is a star in the constellation Boötes. The name Izar is derived from the Arabic for "veil". Izar is actually a binary star, consisting of a bright orange giant and a smaller main sequence star. The orange giant is a fairly late-stage star well into its stellar evolution, having already exhausted its supply of hydrogen fuel. By the time the smaller main sequence star reaches this point in its evolution, the primary star will have lost much of its mass in a planetary nebula and will have evolved into a white dwarf, and the pair will have essentially changed roles: the primary star becoming the dim dwarf, while the lesser A star will shine as a bright orange giant.

Izar is the place from which Starfleet Captain Garth is considered to have hailed. Garth of Izar was a decorated, highly-regarded officer in the Federation Starfleet, who rose to rank of Fleet Captain in the course of his service through the mid-23rd century. His career dissolved in a dramatic descent into madness and attempted genocide, resulting in his commitment to the Elba II asylum for the criminally insane. (TOS: "Whom Gods Destroy")