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Old 08-18-2017, 11:02 PM   #1
xoxoxoBruce
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Aug 19th, 2017: Airglow

From APOD, would they lie to you?



Quote:
Why would the sky glow like a giant repeating rainbow? Airglow. Now air glows all of the time, but it is usually hard to see. A disturbance however -- like an approaching storm -- may cause noticeable rippling in the Earth's atmosphere. These gravity waves are oscillations in air analogous to those created when a rock is thrown in calm water. The long-duration exposure nearly along the vertical walls of airglow likely made the undulating structure particularly visible. OK, but where do the colors originate? The deep red glow likely originates from OH molecules about 87-kilometers high, excited by ultraviolet light from the Sun. The orange and green airglow is likely caused by sodium and oxygen atoms slightly higher up.
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Old 08-19-2017, 08:29 AM   #2
sexobon
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Originally Posted by xoxoxoBruce View Post
From APOD, would they lie to you? ...
There is an alternate theory ...

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Old 08-20-2017, 12:31 PM   #3
Gravdigr
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No...That's an airburst.

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Old 08-24-2017, 11:22 PM   #4
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No sexobon, that's alternative facts..
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Old 08-25-2017, 12:00 PM   #5
Gravdigr
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Originally Posted by SPUCK View Post
No sexobon, that's alternative facts..
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I recently gave an interview to [some magazine], and when I read the article, I was shocked to see that it was filled with lies, and made up facts. They should have told me ahead of time that they did not want me to lie, and make up facts.
~Steve Martin
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