Image: Hubble hooks a one-arm galaxy
(PHYSorg.com Space & Earth)

NGC 4618 was discovered on April 9, 1787, by the German-British astronomer William Herschel, who also discovered Uranus in 1781. Only a year before discovering NGC 4618, Herschel theorized that the `foggy` objects astronomers were seeing in the night sky were likely to be large star clusters located much farther away than the individual stars he could easily discern.