M92 globular cluster has been discovered by Johann Elert Bode in 1777. He wrote then:
“A nebula. More or less round with pale glow. On this occasion, I also want to announce that on December 27, 1777 I have discovered a new nebula in Hercules, not known to me, southwest below the star s in his foot, which shows up in a mostly round figure with a pale glimmer of light. Its longitude is about 11 deg [Sgr] [251 d] and its latitude 66d north.Together with two small [faint] stars, which don’t occur at Flamstead, it appears in the reversing telescope as shown in fig k (in the following volume).”
It is an easy target for binoculars and small scopes, and magnificent view in large instruments. Contains about 330 000 stars and is one of the oldest globular clusters in the Milky Way.
Picture shot with Atik383 camera and TS 130/910 refractor. LRGB frames, 370 minutes total exposure time.