From the constancy, order, symmetry and calm which are associated with the divine, astronomy makes its followers lovers of this divine beauty, accustoming them and reforming their natures, as it were, to a similar spiritual state. 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.