Galaxy Science Fiction was an American science fiction magazine, published from 1950 to 1980. It was founded by an Italian company, World Editions, which hired as editor H. L. Gold, who rapidly made Galaxy the leading science fiction magazine of its time, focusing on stories about psychology, sociology and satire, rather than technology. The June 1951 issue featured the first cover by Ed 'Emsh' Emshwiller, whose humorous approach was well suited to the magazine's contents and became identified with it. By the late 1950s, Frederik Pohl was helping Gold with most aspects of the magazine's production. When Gold's health worsened, Pohl took over as editor, starting officially at the end of 1961.

At its peak, Galaxy greatly influenced the science fiction field. It was regarded as one of the leading sf magazines almost from the start, and its influence did not wane until Pohl's departure in 1969. Gold brought a "sophisticated intellectual subtlety" to magazine science fiction according to Pohl. Sf historian David Kyle agrees, commenting that "of all the editors in and out of the post-war scene, the most influential beyond any doubt was H. L. Gold". Kyle suggests that the new direction Gold set "inevitably" led to the experimental New Wave, the defining science fiction literary movement of the 1960s.

Stories which appeared in Galaxy include: The Fireman, later expanded as Fahrenheit 451 (Ray Bradbury); The Puppet Masters (Robert A. Heinlein); Tyrann, which later became The Stars Like Dust (Isaac Asimov); Gravy Planet, which became The Space Merchants (Pohl & Kornbluth); Baby is Three, part of More Than Human (Theodore Sturgeon); The Caves of Steel (Isaac Asimov); Gladiator-at-Law (Pohl & Kornbluth); The Stars My Destination, revised as Tiger! Tiger! (Alfred Bester); Wolfbane (Pohl & Kornbluth); Hugo-winning The Big Time (Fritz Leiber); Hugo-winning Or All the Seas with Oysters (Avram Davidson); and the serial Time-Killer, in book form Immortality Delivered (Robert Sheckley).

Sources: SFE and wikipedia.