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)
Saturday, September 21, 2013
Full Pinwheel
The light of four space-based telescopes (visible, infrared, ultraviolet and x-ray frequencies) are combined for this image of Messier 101, the Pinwheel Galaxy.
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