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)
Wednesday, October 21, 2015
Close Approach
Today's Astronomy Picture of the Day shows the northern region of Saturn's ice-moon Enceladus, courtesy of the hard-working Cassini orbiter. It is interesting to put this image alongside the images from New Horizon's visit to Pluto. Dwarf planets and moons showing more complexity than we ever thought possible. New headaches for the IAU and it's attempt to neatly label everything!
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