Credit & Copyright: Alexandros Maragos
Explanation:
What's happened to the sky?
Several common features of the
daytime sky
are interacting in uncommon ways.
First, well behind the
silhouetted hills, is the typically bright
Sun.
In front of the Sun are thin clouds,
possibly the home to a layer of
hexagonal ice crystals that together are creating the
22 degree halo of light
surrounding the Sun.
The unusual bent line that crosses the image is a
contrail -- a type of cloud
created by a passing airplane.
Much of the
contrail must actually be
further away than the thin cloud because it casts a shadow onto the cloud,
giving an unusual
three-dimensional
quality to the featured image.
The
featured
image was taken in late January in the
city of
Patras in West
Greece.
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:
halo - гало
Публикации со словами: halo - гало | |
См. также:
Все публикации на ту же тему >> |