| 1948 N. B. Wilkinson in Astounding Sci. Fiction July 38/1
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Religious prophets‥were recruiting funds and followers for huge space arks in which they would journey to a promised planet.
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| 1973 A. C. Clarke Rendezvous with Rama (1974) 44
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Some writers suggested that these Space Arks should be built in the form of concentric spheres; others proposed hollow, spinning cylinders so that centrifugal force could provide artificial gravity—exactly what we've found in Rama ‥
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| 1973 A. C. Clarke Rendezvous with Rama 42
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What we have here is undoubtedly a ‘Space Ark’. It's an old idea in the astronautical literature; I've been able to trace it back to the British physicist J. D. Bernal, who proposed this method of interstellar colonization in a book published in 1929.
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| 1977 J. W. Macvey Interstellar Travel (1978) 8
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These include generation travel (space arks) and the use of cryogenics (suspended animation).
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| 1998 C. Pellegrino Afterword in C. Pellegrino & G. Zebrowski Star Trek: Next Generation: Dyson Sphere (1999) 212
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By contrast to what has traditionally been known as the large, slow-moving ‘space ark’ approach to interstellar flight, Valkyrie becomes a low mass speedboat.
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| 1999 Extrapolation Summer 155
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Most readers will resolve the instability of science and fantasy by developing a rational explanation, first by hypothesizing that this ‘whorl’, as it's called, with its cities visible above in the night sky, is some sort of space ark (generation starship) illuminated with the futuristic equivalent of a huge fluorescent light bulb.
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