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, October 15, 2017
Make New Friends
Today's Astronomy Picture of the Day examines the origin of gold (and other "heavy" metals) on our planet. Could the gold you wear as jewelry be a lucky accident of astronomical coordinates?
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