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Airglow over Australia

On October 7, an astronaut aboard the ISS shot this photograph over Australia. The orange hue enveloping Earth is known as an airglow, which is light produced by photochemical processes in the upper atmosphere. The phenomenon typically occurs when molecules (mostly nitrogen and oxygen) are energized by ultraviolet radiation from sunlight. (Credit: NASA)

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File size: 9.06 MB
Image size: 5568 x 3712 pixels
Resolution: 96 dpi

Photo taken on October 7, 2018

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