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)
Wednesday, August 22, 2018
Approach to Rubble
Today's Astronomy Picture of the Day shows an increasingly detailed view of asteroid 162173 Ryugu, as JAXA's Hayabusa 2 vehicle moves every closer.
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