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)
Sunday, June 16, 2019
Wart on a Cosmic Slushy
Today's Astronomy Picture of the Day shows us Ahuna Mons on the surface of main belt asteroid Ceres. What caused this unusual feature? Perhaps a (geologically "recent") bubble of mud from the interior of the dwarf planet?
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