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, January 5, 2014
Shells and Streams
Today's Astronomy Picture of the Day shows shells around an elliptical galaxy (several theories exist as to why this happens).
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