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)
Tuesday, April 17, 2018
Eye in the Sky
Today's Astronomy Picture of the Day is a Hubble Space Telescope look at Messier 57, The Ring Nebula (found in the constellation of Lyra. Visible even in small telescopes (the view is enhanced with a special filter), along with others such as the Dumbbell Nebula (Messier 27), it is a favorite target of mine.
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