The Guard stars of the Little Dipper protect Polaris from the Great Bear, just in case he might try to catch the North Star for himself. 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. Purple O's with a diagonal slash through them are quasars.