The Big One [9000 pixel width]
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I wonder why the Saturn’s band of reflected ring-light has such a sharp lower (southern?) boundary. If the planet’s surface was solid and matte, one would expect the brightness of the reflected light to vary smoothly with latitude; instead, it seems to cut off almost like a focused image.
Perhaps it is “focused” by the same effect that causes a ring around our moon: ice crystals in the upper atmosphere.
