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, October 12, 2019
Two Perspectives
Today's Astronomy Picture of the Day shows our blue dot from two vastly different perspectives: Earth as seen from Saturn (900 million miles), Earth as seen from Mercury (61 million miles).
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