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, March 4, 2018
Layers
Today's Astronomy Picture of the Day shows layers and layers across the sky: from furthest (Venus, then the Moon) to nearest (clouds and then birds).
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