Orbit was a series of anthologies of new science fiction edited by Damon Knight, often featuring work by such writers as Gene Wolfe, Joanna Russ, R. A. Lafferty, and Kate Wilhelm. The anthologies tended toward the avant-garde edge of science fiction, but by no means exclusively; occasionally the volumes featured nonfiction critical writing or humorous anecdotes by Knight. Inspired by Frederik Pohl's Star Science Fiction series, and in its turn an influence on other original speculative fiction anthologies, it ran for over a decade and twenty-one volumes, not including a 1975 "Best of" collection selected from the first ten volumes.