The Big Dipper, the famous and prominent part of
Ursa Major, the
Greater Bear, is seen through the open shutter of the 90-inch
telescope of the University of Arizona atop Kitt Peak, the silhouette
of the telescope's framework seen against the sky.
Dubhe and Merak, the "Pointers," point down and to the right
to Polaris in Ursa Minor.
Mizar (Zeta Ursae Majoris) is easily separated from its companion
Alcor (Flamsteed 80). The central five stars of the Dipper,
plus Alcor and several other stars, consititute a physical group, the
Ursa Major Cluster.