Zero-point energy
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Robert L. Forward
LIGO
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Van Allen radiation belt
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List of science-fiction authors
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Tractor beam
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Gregory Benford
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Nuclear photonic rocket
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Beam-powered propulsion
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Solar sail
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Statite
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September 21
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Mars in fiction
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Interstellar travel
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Hard science fiction
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August 15
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Robert Lull Forward
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