Messier 101

zeta ursae majoris

Mizar

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Mizar, Zeta Ursae Majoris (ζ UMa), is a quadruple star system in Ursa Major. It has a combined apparent magnitude of 2.04 and lies at… Read More »Mizar

eta ursae majoris

Alkaid

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Alkaid, Eta Ursae Majoris (η UMa) is a blue main sequence star with an apparent magnitude of 1.86, located at a distance of 103.9 light… Read More »Alkaid

epsilon ursae majoris

Alioth

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Alioth, Epsilon Ursae Majoris (ε UMa), is the brightest of the seven stars of the Big Dipper and the brightest star in the constellation Ursa… Read More »Alioth