APOD: 2021 April 18 - Rainbow Airglow over the Azores

What an amazing scene of what our Cosmos presents to us, seemingly at will! The physics and chemistry working together yield a great movement of awe inspiring and ever changing colors... Awesome APOD, Maj William W. 'Bill' Price!!!

As an adjunct to your outstanding Post, Major, I found this short video clip which provides your readers with a view of what this looks like when moving in real time (as captured)... I was totally taken aback by the magnificence of this occurrence... It should be viewed in FULL SCREEN for the best presentation...
Here is the link: https://youtu.be/Y7z-L-b0Uy0

Enjoy!
Kerry
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Thank you my friend Maj William W. 'Bill' Price for posting the NASA Astronomy Picture of the Day (APOD) for Sunday, April 18, 2021 entitled "Rainbow Airglow over the Azores."

Image: Rainbow Airglow over the Azores - Image Credit & Copyright - Miguel Claro (TWAN); Rollover Annotation - Judy Schmidt

APOD background
"Explanation: 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. The featured image was captured during a climb up Mount Pico in the Azores of Portugal. Ground lights originate from the island of Faial in the Atlantic Ocean. A spectacular sky is visible through this banded airglow, with the central band of our Milky Way Galaxy running up the image center, and M31, the Andromeda Galaxy, visible near the top left."

Moonglow (Take 1)
https://www.youtube.com/watch?v=lsWX3X3JOJA

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Great picture share Maj William W. 'Bill' Price , looks like an oversized rainbow in the night sky sir.