Dot Against the Dark
As if trying to get our attention, Mimas is positioned against the shadow of Saturn's rings, bright on dark. As we near summer in Saturn's northern hemisphere, the rings cast ever larger shadows on the planet. With a reflectivity of about 96 percent, Mimas (246 miles, or 396 kilometers across) appears ...
More: https://images.nasa.gov/details/PIA18282
Credit: NASA/JPL-Caltech/Space Science Institute
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