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The constellation of Hercules lies between Lyra and Corona Borealis and is most recognisable by the 'Keystone' at the centre. It contains few deep sky objects but is noted for the glorious globular cluster M13, which can be visible to the unaided eye and is easy to find as it lies along one side of the keystone. There is another globular, M92, which is less easy to find but would be counted a fine object in its own right if not living in the shadow of M13.