Regions:  

 

 

 

The Gegenschein Over Chile

By: Yuri Beletsky

 

Cerro Paranal, Chile

October 2007

 

As seen on Astronomy Picture of the Day a rarely discernable faint glow known as the gegenschein (German for "counter glow") can be seen 180 degrees around from the Sun in an extremely dark sky. The gegenschein is sunlight back-scattered off small interplanetary dust particles. These dust particles are millimeter sized splinters from asteroids and orbit in the ecliptic plane of the planets. Pictured above from October 2007 is one of the most spectacular pictures of the gegenschein yet taken. Here a deep exposure of an extremely dark sky over Paranal Observatory in Chile shows the gegenschein so clearly that even a surrounding glow is visible. In the foreground are several of the European Southern Observatory's Very Large Telescopes, while notable background objects include the Andromeda galaxy toward the lower left and the Pleiades star cluster just above the horizon. The gegenschein is distinguished from zodiacal light near the Sun by the high angle of reflection. During the day, a phenomenon similar to the gegenschein called the glory can be seen in reflecting air or clouds opposite the Sun from an airplane. Yuri Beletsky (ESO)

All TWAN photos and videos are copyrighted.

 

                 

(0)

 

Home  |  Galleries  |  About TWAN  |  Contact Us  |  Photo Policy