The Geminids meteor shower, around October 19. Description Look for the two bright stars, Castor and Pollux, which form one vertex of the Winter Hexagon. 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 . Dark nebula are grey rectangles . Green x's are x-ray sources.