 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.


 Archive - Earth's Shadow in Red Light

   September 18, 2021

    6a0105371bb32c970b019b00f50755970b

   Every weekend we present a notable item from our archives.

   This EPOD was originally published November 30, 2013.

   Photographer:  Luis Argerich
   Summary Authors:  Luis Argerich;  Jim Foster

    6a01116860210d970c019b00fbd174970c-320wi The photo above shows a
   view near  Tornquist, Argentina, using a filter sensitive to the 720
    nm region (red light) of the  electromagnetic spectrum. This is
   the far-end of the  visible spectrum -- wavelengths are longer here
   than in the green or blue portions of the spectrum. The camera is
   looking toward the eastern horizon just after sunset. Note the
   blue-fringed strip of sky between the two hill slopes at center. This
   is known as the  Belt of Venus. Our eyes, which utilize the entire
   visible spectrum (from about 375-750 nm), sees this band in pinkish
   hues. The dark wedge below the Belt of Venus is the edge of night --
   the rising  Earth's shadow. Healthy vegetation appears white here
   since  chlorophyll is reflective in red light. The photo at left
   shows that, even in winter, the Argentinian plains are always green. It
   was taken on July 5, 2013, the same day and at the same location as the
   above photo.

   Photo details - Inset:  Camera Model: Canon EOS 6D; Aperture: f/0.0;
   Exposure Time: 0.017 s (1/60); ISO equiv: 1600.
     * Tornquist, Argentina Coordinates: -38.071660,-62.008162

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   of Mount St. Helens  Journey to the Center of the World  Archive
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    More...

Geography Links

     *  Atlapedia Online
     *  CountryReports
     *  GPS Visualizer
     *  Holt Rinehart Winston World Atlas
     *  Mapping Our World
     *  Perry-Castañeda Library Map Collection
     *  Types of Land
     *  World Mapper

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

https://epod.usra.edu
 
