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)
Monday, May 4, 2015
Serendipity
A delay due to a lost lens cap led to today's Astronomy Picture of the Day: spectacular auroral activity in the skies of Norway. (I do wonder, however, if they ever found that lens cap!)
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