Cassini, the robotic emissary flying high above Saturn, captured this view of an alien copper-colored ring world. The overexposed planet has deliberately been removed to show the unlit rings alone, seen from an elevation of 60簞, the highest Cassini has yet attained. The view is a mosaic of 27 images taken with the Cassini spacecraft wide-angle camera on 21 January 2007, over the course of about 45 minutes and at a distance of approximately 1.6 million kilometers from Saturn. Image scale is 90 kilometers per pixel. The planet's shadow carves a dark swath across the ring plane at the right. Several moons of Saturn are also visible in this image: Epimetheus (116 kilometers across) at the 1 o'clock position, Pandora (84 kilometers across) at the 5 o'clock position, Janus (181 kilometers across) at the 10 o'clock position. Bright clumps of material in the narrow F ring moved in their orbits between each of the color exposures, creating a chromatic misalignment that provides some sense of the continuous motion in the ring system. Radially extending lens-flare artifacts, which result from light being scattered within the camera optics, are present in the view.

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達志影像

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