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, March 19, 2016
Elevating Ceres
Today's Astronomy Picture of the Day takes data returned by the Dawn spacecraft and shows the peaks and valleys (and craters) around one region of Ceres.
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