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, October 3, 2014
Around the Universe
Today's Astronomy Picture of the Day is an "all sky" image of aurora, the Milky Way (and even the ground) during a night in Sweden.
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