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Earth's airglow

Earth's airglow

C042/0021

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Credit

JOSE ANTONIO PENAS / SCIENCE PHOTO LIBRARY JOSE ANTONIO PENAS / SCIENCE PHOTO LIBRARY

Caption

Earth's airglow. Image showing the different colours of airglow that appear at varying altitudes in the Earth's atmosphere (from top to bottom: exosphere, thermosphere, mesosphere, stratosphere, troposphere). Airglow is a faint emission of light by a planetary atmosphere that occurs when atoms and molecules in the upper atmosphere, excited by sunlight, emit light to shed their excess energy. Airglow constantly shines throughout Earth's atmosphere creating a 'bubble' of light that encases the entire planet. The composition of the atmosphere at different altitudes causes different colours of light to be emitted and this effect can be used to study the different layers of the atmosphere, such as temperature, density, and composition.

Release details

Model release not required. Property release not required.

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