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)
Friday, November 15, 2013
Flash! Aaa-aaa!
Today's Astronomy Picture of the Day is another (very different) view of the recent eclipse: at the moment of totality, a diffraction grating is used to capture the Sun's spectrum.
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