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)
Sunday, April 14, 2019
Holes in Collison
Today's Astronomy Picture of the Day is a short video simulating what happens when two black holes merge. (Which is a nice way of saying...collide...)
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