Blue sun may refer to:
- A star with a suitable spectral type, O
- Blue Sun Corporation: a fictional corporation in the Firefly television series.
Famous quotes containing the words blue and/or sun:
“Debussy—A pretty girl with one blue eye and one brown one.”
—H.L. (Henry Lewis)
“Reason now gazes above the realm of the dark but warm feelings as the Alpine peaks do above the clouds. They behold the sun more clearly and distinctly, but they are cold and unfruitful.”
—G.C. (Georg Christoph)