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, December 6, 2013
2,000 Days
Today's Astronomy Picture of the Day shows the gamma-ray sky courtesy of the Fermi Gamma-Ray Space Telescope, recently passing through it's 2,000th day in orbit.
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