Alcor
Alcor is a double star in the constellation Ursa Major. It is the fainter companion to Mizar, the middle star in the handle of the… Read More »Alcor
Ludwig’s Star
Mizar
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