Rigel is the 7th. Procyon the 8th. Betelgeuse the 10th. Aldebaran, Pollux, and Castor are also among the night's 25 brightest stars. The size of each star indicates its relative magnitude .
Constellation names are light blue .
Messier object numbers are pink . Globular clusters are gold starbursts . Open clusters are dotted white circles. Planetary nebula are green diamonds . Bright nebula are magenta squares .