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Circunzenithal arc from England

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Author Topic: Circunzenithal arc from England  (Read 490 times)
Paul
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« on: September 16, 2008, 02:35:10 pm »

This is an interesting article.....

http://www.dailymail.co.uk/news/article-1056500/Pictured-Rare-upside-rainbow-spotted-UK.html

P.
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martinastro
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« Reply #1 on: September 16, 2008, 04:33:42 pm »

Thanks for sharing that Paul.

I'm amazed the way the Mail described this as rare. I wonder where they got that information from?. CZA's are not uncommon, I have seen many of them from here over the years.

Here's a few I have seen from here...

http://www.nightskyhunter.com/CZA%201-1.html

http://www.nightskyhunter.com/CZA%203-3.html

http://www.nightskyhunter.com/CZA%204-4.html

Note: on those links I mentioned their rarity, but since then I have learned that they are more common, but not as much as the typical halo, dogs, and UTA  Smiley

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John9929
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« Reply #2 on: September 16, 2008, 04:50:06 pm »

And I'm a bit surprized that Jacqueline hasn't seen one before. She is a very good astronomer though, I met her and her husband Simon at an RAS meeting in Birr a few years back, very nice people!
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martinastro
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« Reply #3 on: September 16, 2008, 04:58:59 pm »

Surprising indeed, although I reckon many astronomers are not as familar with atmospheric optics as we would be. Maybe the editor blew things out of proportion a little for the article. Notice the contradiction with the 'upside-down rainbow'. Rainbows are caused by water droplets but CZAs form from ice crystals. Very poor research done within that article.

However, it's a very nice image and it's cool that you meet Jacqueline before John, you must tell me all about that one next time  Smiley
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brianb
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« Reply #4 on: September 17, 2008, 02:06:06 pm »

Quote
And I'm a bit surprized that Jacqueline hasn't seen one before.
Fact of the matter is, most people walk around with their eyes closed. A few times I've pointed solar haloes or sundogs out to people and they claim they've never seen one before ... yet they're by no means uncommon, let alone rare, phenomena.
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John9929
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« Reply #5 on: September 17, 2008, 05:32:12 pm »

True, or looking at their feet!
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John9929.
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« Reply #6 on: September 17, 2008, 06:19:18 pm »

Here's some more images of the effect it's also a cool site for atmospheric optics in general, enjoy.

http://www.atoptics.co.uk/rainbows/notabow.htm
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