Hubble’s Caldwell Catalog – #15 (NASA)

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“Caldwell 15 was discovered by British astronomer William Herschel in 1793. With a magnitude of 8.8, the nebula is found in the constellation Cygnus, and it is best observed during warm summer nights in the Northern Hemisphere. It will appear low in the northern sky for Southern Hemisphere observers during the winter. Also known as NGC 6826, Caldwell 15 is about 2,200 light-years away from Earth.” (NASA)

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