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, August 27, 2017
Heart Clouds
Today's Astronomy Picture of the Day shows hydrogen, oxygen and sulfur interacting in the Heart Nebula (IC 1805).
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