The Trifid Nebula, M20, is a pink emission nebula with a blue reflection nebula on one edge. This detail is taken from a small portion of a 35mm frame.

Astro-Physics 105mm (4.1 inch) refractor at f/4.5. Three 14-minute exposures on gas-hypersensitized Kodak Pro 400 PPF color-negative film. North is to the upper right. Photographed from near Vicuña, Chile. ©1998