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)
Thursday, March 9, 2017
To Far Centaurus
Today's Astronomy Picture of the Day shows "active galaxy". The visible image is only a portion of what is going on there.
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