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)
Friday, January 18, 2013
Stickney
Today's Astronomy Picture of the Day features on the most prominent feature of Phobos, one of the hurtling moons of Mars: Stickney Crater (nearly 50% the size of the moon).
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