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)
Thursday, September 6, 2018
Bowshock Filaments
Today's Astronomy Picture of the Day shows filaments of the Veil Nebula, the "western" part of the overall structure. The nebula is remnants of a supernova event, marking the progress of the shockwave through interstellar space.
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