M13 (NGC 6205), the well-known Hercules globular cluster.
Image Linkhttps://ocastronomers.org/wp-content/uploads/2019/01/m013.jpg
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Additional Information With a total light about equal to a 6th magnitude star, M13 can be seen with the unaided eye in a dark sky. It is believed to be 25,000 light-years away and about 170 light-years in diameter.