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Thread: the spiral arms of Saturn's rings

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    Default the spiral arms of Saturn's rings



    upfyrman, ssocal, KathyNS and 14 others like this.
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    Default Re: the spiral arms of Saturn's rings

    Such a beautiful image. Thank you NASA, the other countries involved and the amazing Cassini space craft. What a mission!
    Brodavid1953 likes this.
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    Default Re: the spiral arms of Saturn's rings

    Great images in there, thanks for the link not_Fritz!
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    Default Re: the spiral arms of Saturn's rings

    That's one beautiful picture there, amazing.
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    Default Re: the spiral arms of Saturn's rings

    Rings have arms -- very cool!

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    Default Re: the spiral arms of Saturn's rings

    "Fascinating!"
    - Spock

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    Default Re: the spiral arms of Saturn's rings

    What is the origin of the compression waves? How do the moons motion generate the compression waves through which the ring particles move?
    Woody

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    Default Re: the spiral arms of Saturn's rings

    It's a gravitational resonance effect. In this case there is a resonance with the moon Janus as described in the article.

    Lin and Shu developed the theory of spiral density waves back in the 1970s. Great work, tough math. I'll see if I can find a decent link after I get home.
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    Default Re: the spiral arms of Saturn's rings

    Thanks nFA. So it seems the orbital resonance wave is generated between Janus and Epimetheus. I read https://en.wikipedia.org/wiki/Density_wave_theory and am reading https://en.wikipedia.org/wiki/Orbital_resonance. I hope to understand it from these articles and will let you know if I'm still confused.
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    Default Re: the spiral arms of Saturn's rings

    Quote Originally Posted by stargazer55 View Post
    Thanks nFA. So it seems the orbital resonance wave is generated between Janus and Epimetheus. I read https://en.wikipedia.org/wiki/Density_wave_theory and am reading https://en.wikipedia.org/wiki/Orbital_resonance. I hope to understand it from these articles and will let you know if I'm still confused.
    That's what I'd have linked once home. Not there yet. Of course feel free with qs.
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