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, August 13, 2019
Cannon Ball
Today's Astronomy Picture of the Day shows a pulsar (a rotating neutron star) being expelled from the supernova (marked by an expanding bubble of gas) that created it.
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