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NASA

Orbiting around Saturn, the Cassini probe captured this image of the planet -- which is gorgeous, but requires a little explanation. The rings themselves are visible here only as a slit, which seem, as they both share an axis, to pierce the planet's largest moon, Titan. But the rings become visible -- and show their recognizable stripes -- in shadows upon the surface of Saturn.

(Titan, by the way, only appears serene because it is swirling. A dense layer of clouds covers its entire upper atmosphere.)

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