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, November 8, 2017
Variable Ghost
Today's Astronomy Picture of the Day shows NGC 2261, Hubble's Variable Nebula, found near Monoceros. Even relatively modest "amateur" instruments can be used to track the changes that one can see in this astronomical object.
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