A propeller-shaped structure, created by an unseen moon, can be seen in Saturn's A ring.
The propeller, which looks like a small, dark line interrupting the bright surrounding ring material, is in the upper left of this image near the edge of the Keeler Gap. See PIA12790 to learn more about propellers.
This view looks toward the southern, unilluminated side of the rings from about 16 degrees below the ringplane.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on June 3, 2010. The view was acquired at a distance of approximately 279,000 kilometers (173,000 miles) from Saturn and at a Sun-Saturn-spacecraft, or phase, angle of 16 degrees. Image scale is 1 kilometer (3,300 feet) per pixel.
Photo credit: NASA/JPL/Space Science Institute
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