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A white-ish blue spiral that appeared in the sky over Alaska today drew questions, speculation — and a simple explanation.

"It was kind of a shame to think of it as exhaust, I have to admit,” said Todd Salat, who photographed the swirl near Delta Junction.

https://www.adn.com/alaska-news/science/2023/04/15/mysterious-glowing-spiral-in-the-sky-over-alaska-draws-questions-and-a-simple-explanation/

(: Todd Salat of Aurora Hunter)