Encyclopedia > Afterglow

  Article Content

Afterglow

The afterglow is the broad high arch of whitish or rosy light appearing occasionally in the sky above the highest clouds in the hour of deepening twilight, or reflected from the high snowfields in mountain regions long after sunset. The phenomenon is due to very fine particles of dust suspended in the high regions of the atmosphere that produce a scattering effect upon the component parts of white light. After the eruption of Krakatoa in 1883, a remarkable series of red sunsets appeared all over the world. These were due to an enormous amount of exceedingly fine dust blown to a great height by that terrific explosion, and then universally diffused by the high atmospheric currents.

Dust particles cause other similar phenomenona, like the Gegenschein.

(from an old encyclopedia)



All Wikipedia text is available under the terms of the GNU Free Documentation License

 
  Search Encyclopedia

Search over one million articles, find something about almost anything!
 
 
  
  Featured Article
Wheatley Heights, New York

... is a town located in Suffolk County, New York. As of the 2000 census, the town had a total population of 5,013. Geography Wheatley Heights is located at ...

 
 
 
This page was created in 47.5 ms