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, June 5, 2013
Ring! Ring!
Today's Astronomy Picture of the Day is courtesy of the Hubble Heritage project, a nice shot of Messier 57 in Lyra (coming nicely into view for northern hemisphere viewers).
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