The Omega Nebula, also known as the Swan Nebula, Checkmark Nebula, Lobster Nebula, and the Horseshoe Nebula[1][2] catalogued as Messier 17 or M17 or NGC 6618 is an H II region in the constellation Sagittarius.
Telescope 153 mm
CCD Camera
Exposure 300 seconds
27 shots combined into a picture
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