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)
Monday, January 19, 2015
Unfamiliar Messier
Today's Astronomy Picture of the Day takes one of my favorite observing subjects, Messier 42, The Great Nebula of Orion, and casts it into a different light: a view from the infrared frequencies courtesy of the WISE orbiting observatory.
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