Keyhole Nebula - A portion of the Carina Nebula is known as the Keyhole Nebula (NGC 3324), a name given to it by John Herschel in the 19th century. The Keyhole Nebula is actually a much smaller and darker cloud of cold molecules and dust, containing bright filaments of hot, fluorescing gas, silhouetted against the much brighter background nebula.
NGC 2207 and IC 2163 are a pair of spiral galaxies about 80 million light-years away in the constellation Canis Major. Both galaxies were discovered by John Herschel in 1835. So far three supernovae have been observed in #NGC2207
On this day: 28 August 1789, the German-born British astronomer Sir William Herschel discovered Saturn's moon Enceladus during the first use of his new 1.2 m (47 inch) telescope, then the largest in the world. William Herschel's son John Herschel suggested the name after the giant Enceladus of Greek mythology.