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Earth Chgs The Moon's Penumbra Is Huge Tonight
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  1. #1

    The Moon's Penumbra Is Huge Tonight

    I have never seen a Penumbra as far out in diameter from the moon as it is now. Here in South Texas, the sky is clear and the ring is all the way around the moon and takes up half the sky. Can someone get better night pictures than I?
    Don't be dismayed by goodbyes. A farewell is necessary before you can meet again. And meeting again, after moments or lifetimes, is certain for those who are friends. --Richard Bach

  2. #2
    Join Date
    Apr 2009
    Location
    Central Iowa
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    Quote Originally Posted by Seeker22 View Post
    I have never seen a Penumbra as far out in diameter from the moon as it is now. Here in South Texas, the sky is clear and the ring is all the way around the moon and takes up half the sky. Can someone get better night pictures than I?
    Didn't see it but it's typically large before a severe weather event.
    People are quick to confuse and despise confidence as arrogance but that is common amongst those who have never accomplished anything in their lives and who have always played it safe not willing to risk failure.

  3. #3
    This video was posted on the GSM thread. At minute 7:51 mark, David shows what he calls a "moon halo". This is what was over my Cabin in South Texas on the 17th at 11:40PM. I always called these a Penumbra.

    Don't be dismayed by goodbyes. A farewell is necessary before you can meet again. And meeting again, after moments or lifetimes, is certain for those who are friends. --Richard Bach

  4. #4
    Join Date
    Mar 2007
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    West Virginia
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    37,986
    Depending on where you're at it can be viewed as rain or snow ring and telling that will rain or snow a day or two later and more than likely within 24 hours.

  5. #5
    Seeker22, the umbra and penumbra are the main and the diffuse shadows caused by the sunlight being interrupted by a planet, and they therefore stick out into space on the night side of a planet.

    I think it gets a little more complicated, like the reflected sunlight from the full moon illuminates ice crystals in our atmosphere by shining through the earth's penumbra. Can't remember what the halo is called, but I think this kind only happens in very cold weather.

    Wish my memory was better.
    Last edited by Martinhouse; 01-21-2019 at 06:13 PM.

  6. #6
    Yep, it's not a Penumbra, but a 22 degree halo, sometimes called just a Moon Halo. It must have been colder that night than I thought, because those are light refracting on ice crystals in the atmosphere. Here is a wall of them:

    https://results.dogpile.com/serp?q=m...xXuFi8A_9ruBms
    Last edited by Seeker22; 01-22-2019 at 08:32 AM.
    Don't be dismayed by goodbyes. A farewell is necessary before you can meet again. And meeting again, after moments or lifetimes, is certain for those who are friends. --Richard Bach

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