The Trifid Nebula (catalogued as Messier 20 or M20 and as NGC 6514) taken on August the 12th (Ha) and 21st (RGB) is an H II region located in Sagittarius. It was discovered by Charles Messier on June 5, 1764. Its name means 'divided into three lobes'. The object is an unusual combination of an open cluster of stars; an emission nebula (the red portion), a reflection nebula (the blue portion) and a dark nebula (the apparent 'gaps' within the emission nebula that cause the trifurcated appearance; these are also designated Barnard 85).