article: Andromeda galaxy
links: Triangulum galaxy Messier object Earth Dwarf galaxy Al Sufi BBC William Herschel Charles Messier Local Group Messier catalogue Edwin Hubble Ellipse Spitzer Space Telescope New General Catalogue Messier 32 Milky Way J2000.0 Andromeda (constellation) Milky Way–Andromeda collision A for Andromeda Gene Roddenberry Fred Hoyle BBC News