Alcor
Alcor is a double star in the constellation Ursa Major. It is the naked-eye 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