With an apparent magnitude of 1.79, Dubhe (Alpha [α] Ursae Majoris) is the second-brightest star in Ursa Major and the 33rd brightest star in the night sky. It is a spectroscopic binary and lies ...

Astronomers measure a star’s brightness using the apparent magnitude system, where lower values indicate brighter stars.

Ursa Major is visible all year round from the ... His left knee is the brightest star in the constellation called Rigel, and it is a blue supergiant. 5. Follow up from Orion’s knees past his ...