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, September 25, 2013
Cosmic Vacuum
In this artist depiction, black hole IGR J17091-3624 siphons off lifeblood (gas) from its companion star.
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