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)
Friday, March 20, 2015
Different Light
Today's Astronomy Picture of the Day shows the Moon, lit by two different lights: direct light from the Sun and reflected earthshine from our own planet.
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