Credit & Copyright: Regina Kelly
Explanation:
What's happening over the horizon?
Although the scene may appear somehow
supernatural,
nothing more unusual is occurring than a
setting Sun and some well placed clouds.
Pictured above are
anticrepuscular rays.
To understand them, start by picturing common
crepuscular rays that are seen any time that
sunlight pours though scattered clouds.
Now although sunlight indeed travels along
straight lines, the projections of these lines onto the
spherical sky are
great circles.
Therefore, the
crepuscular rays from a
setting (or rising) sun
will appear to
re-converge on the
other side of the sky.
At the anti-solar point 180 degrees around from the
Sun, they are referred to as
anticrepuscular rays.
Featured here is a particularly striking display of
anticrepuscular rays photographed earlier this month in
Westminster,
Colorado,
USA.
Deja vu:
Anticrepuscular Rays over Colorado (I)
1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 |
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:
anticrepuscular rays - сумеречные лучи
Публикации со словами: anticrepuscular rays - сумеречные лучи | |
См. также:
Все публикации на ту же тему >> | |
