The secret life of Saturn's rings
Chapter 1
The frozen debris field
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Chapter 2
Deciphering the optical illusion
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Chapter 3
The cosmic traffic controllers
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Chapter 4
A temporary cosmic masterpiece
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YOUR GOAL
Master of The secret life of Saturn's rings
Ch 3 · The cosmic traffic controllers
teacher We're just drifting ice and dust floating in the dark, Guided by the shepherd moons pulling on our arc.
Fun Fact
Shepherding waves: The tiny moon Daphnis orbits inside a ring gap, kicking up kilometer-high waves of icy dust along the edges.
Glossary
shepherd moon (noun)
A small natural satellite that orbits near the edge of a planetary ring to keep its particles confined. In 1980, Voyager 1 photographed Prometheus and Pandora maintaining the sharp boundaries of Saturn's F ring.
A small natural satellite that orbits near the edge of a planetary ring to keep its particles confined. In 1980, Voyager 1 photographed Prometheus and Pandora maintaining the sharp boundaries of Saturn's F ring.
Quiz
Which spacecraft spent 13 years orbiting Saturn, discovering many of these delicate gravitational interactions before its mission ended in 2017?
Quiz
Which tiny Saturnian moon orbits inside the Keeler Gap and creates dramatic vertical waves in the ring material?
Quiz
What is the scientific term for the distance within which a planet's tidal forces will tear an approaching moon apart?
Quiz
Why don't the particles inside Saturn's main rings clump together to form one giant, solid moon?
Quiz
Which of Saturn's rings is famous for its braided, twisted appearance caused by the moons Prometheus and Pandora?
Quiz
What shape do the gravitational waves created by the moon Prometheus look like as it interacts with the F ring?
Quiz
What causes the ghostly, dark 'spokes' that appear to rotate across Saturn's rings?