May 18, 2007, Newsletter Issue #75: All the colors of the rainbow

Tip of the Week

Okay, so the colors of a nebula ARE pretty, but why are they there? Believe it or not, itīs not God painting a picture. The pinkish red color is the color of ionized hydrogen, the blue-green, which when mixed with the pink looks purple, is the color of ionized oxygen, and the blue is light being reflected from nearby stars.

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