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Musical Rings
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Musical Rings

September 28, 2004
Looking something like the fibrous bow of a violin, Saturn's colorful rings sweep through this spectacular natural color view while two small moons look on. From left, the moons visible here are Janus (181 kilometers, or 112 miles across) and Mimas (398 kilometers, or 247 miles across). Cassini's view in this image is from beneath the ring plane; the moons are on the far side of Saturn. Janus leads Mimas as the two moons orbit the planet. Nearly the entire ring system can be seen in this view. The diaphanous C ring appears at the upper right, followed by the multi-hued B ring. Next, the famous Cassini division (4,800 kilometers, or 2,980 miles wide) separates the A and B rings. The outer edge of the B ring which forms the inner boundary of the Cassini division is maintained by a gravitational resonance with Mimas. Near the outer edge of the A ring are the Encke Gap (325 kilometers, or 202 miles wide) and the barely visible Keeler Gap (35 kilometers, or 22 miles wide). The faint,


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