M13, also known as the Great Globular Cluster in Hercules or NGC 6205, is one of the most prominent and well-studied globular clusters in the Northern Hemisphere. Located in the constellation Hercules, it lies approximately 24,100 light-years (7.4 kiloparsecs) from Earth and has an apparent magnitude of 5.8, making it visible to the naked eye under dark skies with averted vision. The cluster spans about 20 arcminutes in apparent size and contains over 100,000 stars, with estimates suggesting a total mass of around 600,000 times that of the Sun. First discovered by Edmond Halley in 1714 and later cataloged by Charles Messier in 1764, M13 is renowned for its dense stellar core, where star densities are over a hundred times greater than in the Sun’s vicinity