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, May 14, 2013
When Galaxies Collide
Today's Astronomy Picture of the Day is a short video showing what happens when galaxies "collide" (interact) and matching the model with several shots of actual galaxies. Danger! We're going to collide with the Andromeda Galaxy! Eventually.
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