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, January 26, 2014
Hot Loops
Today's Astronomy Picture of the Day shows us the Sun in the ultraviolet regions of the spectrum. Sunspots are active places!
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