NASA - NASA Space Telescope Discovers Largest Ring Around Saturn

This artist's conception shows a nearly invisible ring around Saturn — the largest of the giant planet's many rings. It was discovered by NASA's Spitzer Space Telescope. Image credit: NASA/JPL-Caltech/Keck › Full image and caption › Related animation PASADENA, Calif. -- NASA's Spitzer Space Telescope has discovered an enormous ring around Saturn -- by far the largest of the giant planet's many rin

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土星から600万キロ離れた新たな「輪」を発見、NASA(CNN.co.jp)