 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.


 Twilight from Mount Penteli, Greece

   March 15, 2021

    _MG_1915

   Photographer:  Konstantinos Christodoulopoulos
   Summary Author:  Konstantinos Christodoulopoulos;  Jim Foster

   Shown above is the captivating  twilight sky I observed several
   weeks ago from  Mount Penteli in the  Attica region of Greece.
   Its summit, known as Pyrgari, has an elevation of 3,638 ft (1,109 m).
   These rich, marigold  colors occurred during the transition from
   civil to nautical twilight. When the Sun’s below the horizon, the
   indigo and blue colors are scattered from view by the increased
    path-length of sunlight, but the longer wavelength colors (yellows,
   oranges and reds) remain until nightfall. Photo taken on December 25,
   2020.
   Photo Details: Canon EF camera; 24 mm; f/3.5; USM lens; 2-second
   exposure; ISO 200; Digipod A 2541P Tripod; Manfrotto 496 RC2 Ball Head.
     * Mount Penteli, Greece Coordinates:  38.0667, 23.8833

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    More...

Atmospheric Effects Links

     *  Atmospheric Optics
     *  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.

https://epod.usra.edu
 
