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, July 5, 2015
Bow Shock
Today's Astronomy Picture of the Day shows Zeta Ophiuchi, a "runaway star" plowing it's way through the less-than-perfect vacuum of it's local neighborhood.
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