Astronomy Picture of the Day
    


Crepuscular Rays Over Utah
<< Yesterday 31.08.2005 Tomorrow >>
Crepuscular Rays Over Utah
Credit & Copyright: Jean Nesheim
Explanation: What could cause such rays of dark? Dark sky rays were caught in spectacular fashion earlier this month above Utah, USA. The cause is something surprisingly familiar: shadows. Clouds near the horizon can block sunlight from reflecting off air, making columns outward from the Sun appear unusually dark. Cloud shadows can be thought of the complement of the more commonly highlighted crepuscular rays, also visible above, where sunlight pours though cloud holes. Sometimes, on the opposite side of the sky, anticrepuscular rays can also be seen.

January
February
March
April
May
June
July
August
September
October
November
December
 < August 2005  >
Mo Tu We Th Fr Sa Su
1234567
891011121314
15161718192021
22232425262728
293031



Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (USRA)
NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.

Based on Astronomy Picture Of the Day

Publications with keywords: crepuscular rays
Publications with words: crepuscular rays
See also: