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)
Thursday, September 4, 2014
Wall Chart
Today's Pluto Picture of the Day shows the largest known Trans-Neptunian Objects in comparison to the big blue marble we live on.
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