These great hollow globes of artificial super-metals, and artificial transparent adamant, ranged in size from the earliest and smallest structures, which were no bigger than a very small asteroid, to spheres considerably larger than the Earth. (Olaf Stapledon, STAR MAKER)
Saturday, April 16, 2016
Zooming
Today's Astronomy Picture of the Day shows the proposed Heliopause Electrostatic Rapid Transit System. 100 Astronomical Units in 10+ years!
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