The Crescent Nebula is an emission nebula in the constellation Cygnus, about 5000 light-years away from Earth. It was discovered by William Herschel in 1792. It is formed by the fast stellar wind from the Wolf-Rayet star WR 136 colliding with and energizing the slower moving wind ejected by the star when it became a red giant around 250,000 to 400,000 years ago. The result of the collision is a shell and two shock waves, one moving outward and one moving inward. The inward moving shock wave heats the stellar wind to X-ray-emitting temperatures.
NGC 145, also known as Arp 19, is a barred spiral galaxy in Cetus, notable for its three spiral arms.
NGC 14 is an irregular galaxy in the Pegasus constellation. It was included in Halton Arp's Atlas of Peculiar Galaxies, under the section "Galaxies with the appearance of fission," since the irregular appearance of this galaxy causes it to look like it is coming apart. It was discovered on September the 18th 1786 by William Herschel.
NGC 16 is a lenticular galaxy located in the Pegasus constellation. It was discovered on September 8, 1784, by William Herschel.
NGC 22 is a spiral galaxy located in the Pegasus constellation. It was discovered in 1883 by Édouard Stephan.
"Legacy Survey Sky Browser". www.legacysurvey.org. Retrieved 2023-05-19.
NGC 54 is an edge-on spiral galaxy in the constellation of Cetus. The galaxy was discovered by Wilhelm Tempel in 1886, and he defined it as "very faint, pretty small, round." The galaxy is 90,000 light years in diameter, making it slightly smaller than the Milky Way.
NGC 275 is a barred spiral galaxy located approximately 63 million light-years from the Solar System in the constellation Cetus. It is one of a pair of galaxies, the other being NGC 274. It was discovered on October 9, 1828, by John Herschel.
NGC 276 is a barred spiral galaxy located approximately 626 million light-years from the Solar System in the constellation Cetus. It was discovered in 1886 by Frank Muller and was later also observed by DeLisle Stewart.
NGC 298 is a spiral galaxy in the constellation Cetus. It was discovered on September 27, 1864 by Albert Marth. NGC 298 is situated close to the celestial equator and, as such, it is at least partly visible from both hemispheres in certain times of the year. Given its B magnitude of 14.7, NGC 298 is visible with the help of a telescope having an aperture of 20 inches or more.
NGC 487 is a barred spiral galaxy located about 250 million light-years away from Earth in the constellation Cetus. NGC 487's calculated velocity is 5949 km/s. NGC 487 was discovered by American astronomer Francis Leavenworth on November 28, 1885.
NGC 477 is a spiral galaxy in the constellation Andromeda. It is located approximately 250 million light-years from Earth and was discovered on October 18, 1786 by astronomer William Herschel.
NGC 478 is a spiral galaxy in the constellation Cetus. It is located approximately 283 million light-years from Earth and was discovered in 1886 by astronomer Francis Preserved Leavenworth.
NGC 496, also occasionally referred to as PGC 5037, UGC 927 or GC 288, is a spiral galaxy in the constellation Pisces. It is located approximately 250 million light-years from the Solar System and was discovered on 12 September, 1784 by astronomer William Herschel.
NGC 732 is a lenticular galaxy located 250 million light-years away in the constellation Andromeda. It was discovered by astronomer Édouard Stephan on December 5, 1883 and is a member of Abell 262.
NGC 560 is a lenticular galaxy in the constellation Cetus. It is estimated to be about 250 million light-years from the Milky Way and has a diameter of approximately 150,000 light years. It is part of the Abell 194 galaxy cluster. NGC 560 was discovered on October 1, 1785 by the German-British astronomer William Herschel.
NGC 906 is a barred spiral galaxy in the constellation Andromeda in the northern sky. It is estimated to be 215 million light years from the Milky Way and has a diameter of approximately 110,000 ly. NGC 906 was discovered on October 30, 1878 by astronomer Édouard Stephan.
NGC 939 is a lenticular or elliptical galaxy in the constellation Eridanus. It is estimated to be 241 million light-years from the Milky Way and has a diameter of approximately 80,000 ly. NGC 939 was discovered on October 18, 1835 by astronomer John Herschel.
NGC 721 is a barred spiral galaxy located in the constellation Andromeda about 250 million light years from the Milky Way. It was discovered by the Prussian astronomer Heinrich d'Arrest in 1862.
NGC 538 is a barred spiral galaxy in the constellation of Cetus. It is located about 250 million light-years from the Milky Way with a diameter of approximately 95,000 ly. NGC 538 was discovered by the American astronomer Lewis Swift in 1886.
