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Thread: The Moon - what it has to offer and the best phase to view it

  1. #21
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    Default Re: The Moon - what it has to offer and the best phase to view it



    Quote Originally Posted by mental4astro View Post
    ... a balance is found where the heavier side is drawn to the outside of the orbit, and this locks the oribit period into matching the rotational period. A centrifuge situation.
    I always wondered how exactly this balance is found. If the Moon were perfectly rigid there would never be a tidal lock and the Moon would rotate on its own rate forever. Tidal locks only happen if the satellite is elastic. The deformation dissipates energy, which eventually causes the rotation relative to the larger body to stop. But then how can the angular momentum be maintained? Apparently this happens by moving the satellite further away from, or closer to, the larger body depending on whether the angular rotation is faster or slower than the orbital rotation. That way the angular rotation decreases or increases, thereby preserving angular momentum. The momentum of the larger body also changes by a small amount. I got this from https://en.wikipedia.org/wiki/Tidal_locking , thought I'd add this just in case I wasn't the only one left dangling.
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  3. #22
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    Default Re: The Moon - what it has to offer and the best phase to view it

    What an amazing article
    It gives brief information about the moon..
    Thank you for sharing!!!
    Harshil.


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  4. #23
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    Default Re: The Moon - what it has to offer and the best phase to view it

    Quote Originally Posted by CamelHat View Post
    I always wondered how exactly this balance is found. If the Moon were perfectly rigid there would never be a tidal lock and the Moon would rotate on its own rate forever. Tidal locks only happen if the satellite is elastic. The deformation dissipates energy, which eventually causes the rotation relative to the larger body to stop. But then how can the angular momentum be maintained? Apparently this happens by moving the satellite further away from, or closer to, the larger body depending on whether the angular rotation is faster or slower than the orbital rotation. That way the angular rotation decreases or increases, thereby preserving angular momentum. The momentum of the larger body also changes by a small amount. I got this from https://en.wikipedia.org/wiki/Tidal_locking , thought I'd add this just in case I wasn't the only one left dangling.
    Excellent expansion of the tidal lock explanation, Camelhat! Thank you so much for this!

    Alex.

  5. #24
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    Default Re: The Moon - what it has to offer and the best phase to view it

    Alex,
    I've long admired your lunar sketches both here and on IIS. Really great to see so many of them in one really well composed article.
    Joe
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    Default Re: The Moon - what it has to offer and the best phase to view it

    Great article. Thanks.
    Book marked
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    Default Re: The Moon - what it has to offer and the best phase to view it

    I am not sure why I have not seen this before, Alex.

    This is an outstanding post. I have copied it to my permanent archive.

    I cannot thank you enough. :-)
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    Default Re: The Moon - what it has to offer and the best phase to view it

    There is a free moon atlas you can download and look up the names of what you are viewing. I use it a lot, and it contains a wealth of info.
    It can be configured in different ways. Try it to see if it helps you.

    en:start [Virtual Moon Atlas]

    Mike
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  9. #28
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    Default Re: The Moon - what it has to offer and the best phase to view it

    Yes, Virtual Moon Atlas is also listed at the end of the article! It really is a most extraordinary resource!

    Thanks Mike for bringing it up again

    Alex.

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    Default Re: The Moon - what it has to offer and the best phase to view it

    wow very informative I think I'll look at the moon more often in the right phases
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    Default Re: The Moon - what it has to offer and the best phase to view it

    Quote Originally Posted by dagadget View Post
    wow very informative I think I'll look at the moon more often in the right phases
    Remember, ALL phases are the RIGHT phase to view the Moon. Each phase has different features and shadow play in action. That is why the Full Moon is also the right phase, not the worst phase.

    Alex.
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