This phenomenon was caused by rocket engine exhaust from a SpaceX Transporter-7 mission that launched on the Falcon 9 about three hours earlier in California. Water vapor in the exhaust from the second stage engine freezes and catches high-altitude sunlight, effectively glowing and creating this spiral-galaxy-looking display of light. The payload is 51 satellites, and on its initial polar orbit, it did a pass-by over Alaska, stunning many night-watchers, including myself. ..Photograph taken outside of Trapper Creek, Alaska, USA.
Guess I should add that the green bands and the red are from the Northern Lights, which is what I was out to photograph.
I really wonder how well this is going to do...
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