A large celestial area defined by six of the brightest
stars of the winter sky. Opinion is divided over exactly which stars
define this asterism, though the best approximation of a hexagon shape seems to be
formed by Capella, Aldebaran, Rigel,
Sirius, Procyon and Castor.
Also in this region are the bright stars
Betelgeuse and Pollux, and they are often also described
as part of this winter grouping.