Deep Sky Objects
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M20 The Trifid Nebula
M20 the Trifid Nebula in the constellation Sagittarius.
The object is an unusual combination of an open cluster of stars; an emission nebula (the lower, red portion), a reflection nebula (the upper, blue portion) and a dark nebula (the apparent 'gaps' within the emission nebula that cause the trifurcated appearance
