NASA captures image of Earth in rare 'airglow' from ISS
NASA has captured an image of the Earth from the ISS that shows a rare phenomenon called 'airglow'. The image, taken from an altitude of more than 400 kilometres over Australia, shows an orange coloured layer of light covering Earth. Airglow occurs when molecules (mostly nitrogen and oxygen) energized by ultraviolet (UV) radiation from sunlight release energy in the atmosphere. 