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, May 21, 2015
Slow Mix
Today's Astronomy Picture of the Day shows the merger between two galaxies, a process only slightly slower than the union between two tortoises.
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