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, January 3, 2018
Boom Tomorrow. Always Boom Tomorrow.
Today's Astronomy Picture of the Day shows the Helix Nebula, a "planetary" nebula (also designated as NGC 7293). Objects such as this were tagged "planetary" because of their appearance in early telescopes, but are actually the results of massive stellar outpourings of matter (nova). Will this be our eventual fate?
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