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)
Monday, December 11, 2017
Close Approach to the Iron World
Today's Astronomy Picture of the Day is a short video made up of images from the Mercury MESSENGER vehicle. What would a flyover of the iron planet be like?
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