generation ships

Centuries-long space vessels

Generation ships are hypothetical spacecraft designed for interstellar voyages so long that multiple generations of passengers would live and die aboard before reaching the destination.

The original crew's descendants would complete the journey, having spent their entire lives in transit.

The concept appears frequently in science fiction exploring themes of isolation, social evolution, and what happens to cultures sealed in artificial worlds for centuries: The generation ship had been traveling for so long that its inhabitants had forgotten Earth was real.

Opposites
travel speed/duration

generation shipsteleportation

Instantaneous displacement across space

passenger state during transit

generation shipssleeper ships

Spacecraft with hibernating passengers

voyage scale/ambition

generation shipsspace stations

Crewed spacecraft in orbit

space capsules

Family

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Used worldwide · Timeless · Concrete · Rated G