United States Spacecraft Discovery One is a fictional spaceship that appears in The Space Odyssey series, including the motion pictures 2001: A Space Odyssey and 2010: The Year We Make Contact. It is a nuclear-powered interplanetary spaceship operated in part by the HAL 9000 (Heuristic ALgorithmic computer) artificial intelligence.
This spaceship is founded on solidly conceived, yet unrealized science. One major concession was made in its appearance for the purpose of reducing confusion, and this was to eliminate the huge cooling "wings" which would be needed to radiate the heat produced by its hypothetical thermonuclear propulsion system. The producer and director Stanley Kubrick thought that the audiences might interpret the wings as meaning that the spacecraft was intended to fly through an atmosphere.
The Discovery One was named after Captain Robert Scott's sailing ship RRS Discovery, which was launched in 1901. Writer Arthur C. Clarke used to visit this ship when it was moored in London. It shares its name with a real spacecraft, the Space Shuttle Discovery (OV-103).