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)
Saturday, January 21, 2017
Keeper of the Gap
Today's Astronomy Picture of the Day shows Saturn's tiny shepherd moon Daphnis as imaged by the hard-working Cassini orbiter. As the mission winds down, NASA and JPL are taking a few chances.
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