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)
Monday, November 6, 2017
Active Bodies
Today's Astronomy Picture of the Day shows activity on the surface of Comet 67P/Churyumov-Gerasimenko as imaged by the ESA's Rosetta spacecraft which explored that comet for an extended period.
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