Credit: 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.
1999 2000 2001 2002 2003 2004 2005 2006 2007 |
Январь Февраль Март Апрель Май Июнь Июль Август Сентябрь Октябрь Ноябрь Декабрь |
NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.
|
Публикации с ключевыми словами:
crepuscular rays - сумеречные лучи
Публикации со словами: crepuscular rays - сумеречные лучи | |
|
См. также:
| |
