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)
Sunday, April 3, 2016
Expansive
Today's Astronomy Picture of the Day shows NGC 7635, a.k.a., the Bubble Nebula, in the constellation of Cassiopeia. A relatively easy telescopic object, it's nice to see what that antiquated Hubble Space Telescope can tease out here.
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