Saturn's A ring contained by not one, but seven moons"The density waves created by moons are beautiful to look at, but they actually participate in confining the ring," said researcher Radwan Tajeddine.By Brooks Hays | Oct. 17, 2017 at 5:31 PM
https://www.upi.com/Science_News/2017/10/17/Saturns-A-ring-contained-by-not-one-but-seven-moons/8171508269309/
The orbital resonances of nearby moon's create the vinyl record-like grooves in Saturn's A ring. They also confine the ring and prevent it from diffusing into nothingness. Photo by NASAOct. 17 (UPI) -- Until recently, astronomers assumed Saturn's A ring was contained by a single moon, Janus. But new research shows the A ring, the outermost of Saturn's large, bright rings, is confined by seven moons.
The orbital resonances of the seven moons, new research shows, prevents the A ring from diffusing into nothingness. Without the seven moons, the ring's material would spread out and dissipate entirely over time.
The revelation was made possible by observations recorded by the Cassini probe.
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