This tag should be used for questions related to Robert Heinlein's 1963 novel "Orphans of the Sky," though it may also be useful in the context of questions dealing with the 1941 short stories "Universe" and "Common Sense," from which the novel was derived.

This novel by Robert Heinlein is most famous for popularizing the concept of a "generation ship," i.e. a slower-than-light interstellar starship, so named because many human generations will pass over the course of going from one star to another.

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