M20 - The Trifid Nebula
The Trifid Nebula in Sagittarius is so named because of its three dark rifts. The bright multiple star system in the center of the Trifid is HN 40 and is possibly the source of illumination of the nebula. Additional images and information about this nebula can be found at the Messier Index - M20 and at the Web Nebulae - Trifid Nebula.
The above image is a color composite of both a 780-second monochrome ccd image (shown below) that was obtained on 8 September 2002 combined with a 30-minute color film image (shown at bottom of page) taken on 29 July 1997.
The above image is a ccd monochrome composite from 78, ten-second integrations from 8 September 2002.
Also, see my color film image of this nebula.
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