Airglow observed from the International Space Station

Airglow occurs in Earth's atmospheres as sunlight interacts with atoms and molecules within the atmosphere.

In this image, taken by astronauts aboard the International Space Station (ISS) in 2011, a green band of oxygen glow is visible over Earth's curve. On the surface, portions of northern Africa are visible, with evening lights shining along the Nile river and its delta.

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