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  • =?UTF-8?Q?An_Extremely_Rare_Green_Comet_Is_Visiting_Earth=F0=9F=98=B1?=

    From StarDust@21:1/5 to All on Mon Jan 9 17:29:07 2023
    https://news.binodon24live.com/breaking-an-extremely-rare-green-comet-is-visiting-earth-and-you-can-see-it-withy-naked-eye-2-2/

    NASA and CalTech’s Jet Propulsion Laboratory predicted that the green comet C/2022 E3 (ZTF), which is named, would initially approach the Sun before circling back towards Earth between January 12 and February 2.

    Why GREEN?

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  • From Quadibloc@21:1/5 to StarDust on Mon Jan 9 23:40:25 2023
    On Monday, January 9, 2023 at 6:29:09 PM UTC-7, StarDust wrote:

    Why GREEN?

    According to Wikipedia, the color is likely due to the presence of diatomic carbon.

    John Savard

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  • From Mike Collins@21:1/5 to Quadibloc on Tue Jan 10 06:56:09 2023
    On Tuesday, 10 January 2023 at 07:40:27 UTC, Quadibloc wrote:
    On Monday, January 9, 2023 at 6:29:09 PM UTC-7, StarDust wrote:

    Why GREEN?

    According to Wikipedia, the color is likely due to the presence of diatomic carbon.

    John Savard
    The predicted magnitude at closest approach is about 6. But we can always hope.

    http://astro.vanbuitenen.nl/comet/2022E3

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  • From Chris L Peterson@21:1/5 to All on Tue Jan 10 08:03:48 2023
    On Mon, 9 Jan 2023 17:29:07 -0800 (PST), StarDust <csoka01@gmail.com>
    wrote:

    https://news.binodon24live.com/breaking-an-extremely-rare-green-comet-is-visiting-earth-and-you-can-see-it-withy-naked-eye-2-2/

    NASA and CalTech’s Jet Propulsion Laboratory predicted that the green comet C/2022 E3 (ZTF), which is named, would initially approach the Sun before circling back towards Earth between January 12 and February 2.

    Why GREEN?

    You won't find many comets that get near the Sun that don't have green
    comas. That's from emissions of diatomic carbon and cyanogen.

    And a blue ion tail, which is emissions from CO.

    And a pale yellow dust trail which is reflected sunlight.

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  • From RichA@21:1/5 to StarDust on Tue Jan 10 19:10:59 2023
    On Monday, 9 January 2023 at 20:29:09 UTC-5, StarDust wrote:
    https://news.binodon24live.com/breaking-an-extremely-rare-green-comet-is-visiting-earth-and-you-can-see-it-withy-naked-eye-2-2/

    NASA and CalTech’s Jet Propulsion Laboratory predicted that the green comet C/2022 E3 (ZTF), which is named, would initially approach the Sun before circling back towards Earth between January 12 and February 2.

    Why GREEN?

    The greenest comet I've seen was Holmes.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Martin Brown@21:1/5 to Chris L Peterson on Wed Jan 11 11:47:23 2023
    On 10/01/2023 15:03, Chris L Peterson wrote:
    On Mon, 9 Jan 2023 17:29:07 -0800 (PST), StarDust <csoka01@gmail.com>
    wrote:

    https://news.binodon24live.com/breaking-an-extremely-rare-green-comet-is-visiting-earth-and-you-can-see-it-withy-naked-eye-2-2/

    NASA and CalTech’s Jet Propulsion Laboratory predicted that the green comet C/2022 E3 (ZTF), which is named, would initially approach the Sun before circling back towards Earth between January 12 and February 2.

    Why GREEN?

    You won't find many comets that get near the Sun that don't have green
    comas. That's from emissions of diatomic carbon and cyanogen.

    I wonder if traces of boron might play a part too. It is a relatively
    common light element and is predominantly green emission spectrum.

    And a blue ion tail, which is emissions from CO.

    And carbon radicals of various sorts. The earliest spectroscopy of
    bright comets was a little ambiguous eg.

    https://www.nature.com/articles/009193a0

    And a pale yellow dust trail which is reflected sunlight.

    Hale-Bopp had a particularly fine blue ion tail that was bright enough
    to be perceived as a wonderful shade of blue with the naked eye.

    I reckon we are due a decent bright comet soon.


    --
    Regards,
    Martin Brown

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  • From Chris L Peterson@21:1/5 to '''newspam'''@nonad.co.uk on Wed Jan 11 07:51:21 2023
    On Wed, 11 Jan 2023 11:47:23 +0000, Martin Brown
    <'''newspam'''@nonad.co.uk> wrote:

    I reckon we are due a decent bright comet soon.

    I think we've had more than our share lately. NEOWISE (C/2020 F3) in
    2020 and Leonard (C/2021 A1) at the end of 2021, both easily visible
    to the naked eye with lots of visible structure. Two such comets over
    a couple of years is ahead of the odds!

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