EPOD - a service of USRA

The Earth Science Picture of the Day (EPOD) highlights the diverse processes and phenomena which shape our planet and our lives. EPOD will collect and archive photos, imagery, graphics, and artwork with short explanatory
captions and links exemplifying features within the Earth system. The
community is invited to contribute digital imagery, short captions and
relevant links.


Crepuscular Rays Observed from Italian Alps

December 30, 2022


Tramonto sull'Aiguille Noire de Peuterey

Photographer: Valter Luna

Summary Authors: Valter Luna; Jim Foster

Shown above is a breathtaking set of crepuscular rays that I
observed over the Aiguille Noire de Peuterey in the Italian Alps.
Rays such as this while most often associated with clouds near the
horizon can also take shape when sunlight filters through mountain
passes, as was the case on this mid-summer’s evening. However, for
these rays to be seen, the atmosphere must be dusty. Sunlight
scattered by dust particles, and or other aerosols suspended in
the atmosphere, act to project the rays across the sky. Photo taken on
July 29, 2022.

Photo details: Nikon D100 camera; Sigma lens 18-250 mm (18 mm); 1/250
sec exposure; f / 16; ISO 200


Aiguille Noire de Peuterey, Italy Coordinates: 45.815, 6.893611


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Atmospheric Effects Links

* Atmospheric Optics
* Optic Picture of Day: Gruppo Astrofili Galileo Galilei
* Color and Light in Nature
* The Colors of Twillight and Sunset
* Refraction Index
* Image Gallery: Atmospheric Effects
* What is a Rainbow?

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Earth Science Picture of the Day is a service of the Universities
Space Research Association.

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