Fantastic Universe was a U.S. science fiction magazine which began publishing in the 1950s. It ran for 69 issues, from June 1953 to March 1960, under two different publishers. It was part of the explosion of science fiction magazine publishing in the 1950s in the United States, and was moderately successful, outlasting almost all of its competitors. The main editors were Leo Margulies (1954–1956) and Hans Stefan Santesson (1956–1960).

Algirdas Jonas "Algis" Budrys was a Lithuanian-American science fiction author, editor, and critic. He was also known under the pen names Frank Mason, Alger Rome in collaboration with Jerome Bixby, John A. Sentry, William Scarff, and Paul Janvier. In 1960, he authored Rogue Moon, a novel.