This class K star forms a vertex of the Great Diamond and it can be used to determine the location of another vertex star, Spica.
The first stellar stream discovered contained this namesake star and is the remains of a dwarf galaxy destroyed by the Milky Way. This class K star forms a vertex of the Great Diamond and it can be used to determine the location of another vertex star, Spica. The light of this orange-red giant takes 37 years to reach earth and was famously collected to turn on a series of switches, opening the 1933 Chicago World Fair. It follows Ursa Major around the celestial pole and thus it is called the "Bear Watcher". For 10 points, name this fourth brightest star of the night sky and the brightest of the northern Hemisphere, the alpha star of the constellation Bootes.
The first stellar stream discovered contained this namesake star and is the remains of a dwarf galaxy destroyed by the Milky Way.
{Arcturus} [accept {alpha Bootes} until mention]