The globular cluster M13 in Hercules, a splendid sight in even modest telescopes, serves up a vast metropolis of stars when imaged by the Hubble Space Telescope.
The great globular cluster in Hercules, M13, was first noted by western astronomers in 1714 when Edmund Halley described it as a “little patch” that “shews it self to the naked Eye.” The Hubble Space Telescope takes it to another level.
Globular clusters may be the perfect location to find extraterrestrial civilisations, according to new research announced at the 227th American Astronomical Society meeting in Florida.