Analog Science Fiction and Fact is an American science-fiction magazine published under various titles since 1930. The first issue, titled Astounding Stories of Super-Science, was dated January 1930, published by William Clayton, and edited by Harry Bates. Clayton went bankrupt in 1933 and the magazine was sold to Street & Smith. The new editor was F. Orlin Tremaine, who soon made Astounding the leading magazine in the nascent pulp science fiction field, publishing well-regarded stories such as Jack Williamson's Legion of Space and John W. Campbell's "Twilight". At the end of 1937, Campbell took over editorial duties under Tremaine's supervision, and the following year Tremaine was let go, giving Campbell more independence. Over the next few years Campbell published many stories that became classics in the field, including Isaac Asimov's Foundation series, A.E. van Vogt's Slan, and several novels and stories by Robert A. Heinlein. The period beginning with Campbell's editorship is often referred to as the Golden Age of Science Fiction.
By 1950, new competition had appeared from Galaxy Science Fiction and The Magazine of Fantasy & Science Fiction. Campbell's interest in some pseudo-science topics, such as dianetics (an early version of scientology), alienated some of his regular writers, and Astounding was no longer regarded as the leader of the field, though it did continue to publish popular and influential stories: Hal Clement's novel Mission of Gravity appeared in 1953, and Tom Godwin's "The Cold Equations" appeared the following year. In 1960, Campbell changed the title of the magazine to Analog Science Fiction & Fact; he had long wanted to get rid of the word "Astounding" in the title, which he felt was too sensational. At about the same time Street & Smith sold the magazine to Condé Nast. Campbell remained as editor until his death in 1971; Ben Bova took over from 1972 to 1978, and the character of the magazine changed noticeably. Bova published stories such as Frederik Pohl's "The Gold at the Starbow's End", which was nominated for both a Hugo and Nebula Award, and Joe Haldeman's "Hero", the first story in the Hugo and Nebula Award-winning "Forever War" sequence; Pohl had been unable to sell to Campbell, and "Hero" had been rejected by Campbell as unsuitable for the magazine. Bova won five consecutive Hugo Awards for his editing of Analog.