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The Sagittarius Star Cloud (also known as Delle Caustiche, Milky Way Patch M24, Star Cloud M24, Messier Object 24, IC 4715, or NGC 6603) is a star cloud in the Sagittarius constellation. It was discovered by Charles Messier in 1764. M24 is not considered a deep sky object, as it is a huge star cloud in the Milky Way Galaxy. The stars, clusters and other objects of M24 form a portion of a spiral arm (the Sagittarius or Sagittarius-Carina Arm) which fills a space of significant depth, at a distance of 10,000 to 16,000 light-years.