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, March 4, 2019
Double Arch
Today's Astronomy Picture of the Day shows an arch of planets (and our Moon) above a arch of rock on the shores of Sicily. "Mouseover" the image in the link for a guide to the planets and one star.
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