Airglow, Gegenschein and the Milky Way.
Shown here is an usually intense atmospheric airglow stretching over thin clouds. Unlike auroras, the airglow is due to chemiluminescence which is light produced by chemical reactions. The chemical energy is provided by the sun’s extreme ultraviolet radiation. The gegenschein, sunlight reflected by dust along the solar system’s ecliptic plane, is visible, a faint blue cloud just right of the picture’s center. At the right, the Milky Way seems to rise from the mountain where the Magellan telescopes are located. To the left are the OGLE project and du Pont telescopes. The setting of this image is the Las Campanas Observatory in the southern Atacama desert in Chile.
Image Credit: Yuri Beletsky
Date: April 20, 2013
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