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)
Wednesday, February 13, 2013
Orion in a Different Light
Today's Astronomy Picture of the Day shows the Great Nebula in Orion (M42), closeup and in a different light: the orbiting WISE observatory shows it in infrared, with an astonishing amount of difference from what we see in visible light.
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