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, May 21, 2016
The Under 10K Club
Round objects of the Solar System (under 10,000 kilometers in diameter). Images adjusted for scale. How many have we visited?
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