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Capella is the brightest star in the northern constellation of Auriga. It has the Bayer designation α Aurigae , which is Latinised to Alpha Aurigae and abbreviated Alpha Aur or α Aur . Capella is the sixth-brightest star in the night sky , and the third-brightest in the northern celestial hemisphere after Arcturus and Vega .
AB Aurigae is a young Herbig Ae star [3] in the Auriga constellation. It is located at a distance of approximately 509 light years from the Sun based on stellar parallax. [1] This pre-main-sequence star has a stellar classification of A0Ve, [4] matching an A-type main-sequence star with emission lines in the spectrum.
Because of its northern declination, Auriga is only entirely visible as far as 34° south. A large constellation, with an area of 657 square degrees, it is half the size of the largest constellation, Hydra. Its brightest star, Capella, is an unusual multiple star system among the brightest stars in the night sky.
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Mu Aurigae, Latinized as μ Aurigae, is the Bayer designation for an unconfirmed binary star [12] in the northern constellation of Auriga. It is visible to the naked eye with an apparent visual magnitude of +4.88. [2] Based upon an annual parallax shift of 20.7218 ± 0.4971 mas as seen from Earth, [7] is located 157 light-years from the Sun.
Representative lifetimes of stars as a function of their masses The change in size with time of a Sun-like star Artist's depiction of the life cycle of a Sun-like star, starting as a main-sequence star at lower left then expanding through the subgiant and giant phases, until its outer envelope is expelled to form a planetary nebula at upper right Chart of stellar evolution
Because of its northern declination, Auriga is only entirely visible as far as 34° south. A large constellation, with an area of 657 square degrees, it is half the size of the largest constellation, Hydra. Its brightest star, Capella, is an unusual multiple star system among the brightest stars in the night sky.
The 1603 star atlas "Uranometria" of Johann Bayer assigned stars to individual constellations and formalized the division by assigning a series of Greek and Latin letters to the stars within each constellation. These are known today as Bayer designations. [46] Subsequent star atlases led to the development of today's accepted modern constellations.