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"I went [to the top of] Vehicle Assembly Building and looked down, and tears burst from my eyes. The size of this cathedral where the Rockets take off to go to the moon is so amazing."
- Ray Bradbury

Fusion Sunlight Tube  
  Central light source for a spun cylinder space station.  

Five miles overhead was the fusion sunlight tube, running down the radius of the slightly bulging cylinder that was Farmer's Asteroid. Five miles above the sunlight tube, the sky was a patchwork of small squares, split by a central wedding ring of lake and by tributary rivers...
From At the Bottom of a Hole, by Larry Niven.
Published by Galaxy Magazine in 1966
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