A moon's shadow strikes Saturn's rings near bright spokes on the B ring near the center of this Cassini image taken about one month after the planet's August 2009 equinox.Mimas, the moon casting the shadow, is not shown. To learn more about the ghostly radial markings called spokes, see PIA11144 and PIA08288. Spokes appear bright when they are viewed at phase, or Sun-Saturn-spacecraft, angles
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