Space Odyssey is a science fiction novel by Arthur C. Clarke, first published in 1968. It follows the story of a space mission to Jupiter that is disrupted by an alien intelligence. The novel was adapted into a film of the same name in 1968, directed by Stanley Kubrick and starring Keir Dullea and Gary Lockwood. The term SPACE ODYSSEY is often used to refer to the novel and film, as well as the entire franchise of books, films, and other media related to the story. The crossword solution TREK is a reference to this franchise, as it is a common term used to describe the journey of exploration and discovery featured in the story.