Today's Astronomy Picture of the Day shows an overexposed Mars and a overexposed 51 Ophiuchi. Look carefully around the "halo" of Mars, at about 1:00 PM on the "clock dial" and you'll spot Comet Siding Spring (C/2013 A1) making a close approach to the Red Planet.
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 1, 2019
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