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F ring
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Saturn's rings as seen by the Voyager 2 spacecraft, as it passed within 103,000 km (64,000 miles) of the outermost ring, the F ring ( bottom). Above the F ring is a gap caused by the orbit of a small satellite. Following are three sections of the ring system visible from Earth[emdash]the A ring, Cassini division, and B ring. In the background is the fainter C ring. Saturn: Prometheus
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F ring

astronomy
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Saturn's rings as seen by the Voyager 2 spacecraft, as it passed within 103,000 km (64,000 miles) of the outermost ring, the F ring ( bottom). Above the F ring is a gap caused by the orbit of a small satellite. Following are three sections of the ring system visible from Earth[emdash]the A ring, Cassini division, and B ring. In the background is the fainter C ring.
Saturn's rings as seen by the Voyager 2 spacecraft, as it passed within 103,000 km (64,000 miles) of the outermost ring, the F ring ( bottom). Above the F ring is a gap caused by the orbit of a small satellite. Following are three sections of the ring system visible from Earth[emdash]the A ring, Cassini division, and B ring. In the background is the fainter C ring.

The F ring is a narrow, faint ring located at 2.33 Saturn radii, exterior to the A ring. It is a complex structure, possibly a tightly wound spiral, and is only 30 to 500 km wide.1

Planetary rings are disklike aggregations of particles and larger objects orbiting a planet's equator. The rings of Jupiter, Saturn, Uranus, and Neptune are found within their respective planets' Roche limits. Within this distance, tidal forces prevent small bodies from accreting into larger ones. Saturn's rings, composed mainly of water ice with some rock and dust, are estimated to be only 10 to 100 million years old and may eventually disappear over hundreds of millions of years.234

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6 Britannica Sources
  1. Saturn - The ring system
  2. Saturn: Top Questions
  3. What Are the Rings of Saturn Made Of?
  4. solar system - Formation of ring systems
  5. Uranus - The ring system
  6. planetary ring

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