Credit & Copyright: Goran Strand
Explanation:
Happy Solstice!
Today
is the December solstice,
marking an astronomical beginning of
summer in the southern hemisphere and winter in the north.
On its yearly trek through planet Earth's skies,
at this solstice the Sun reaches its southern most declination,
23.5
degrees
south, at 21:48
UTC.
About 4 days ago the Sun was near this seasonal southern limit and so only just
above the horizon at local noon over Ostersund in central Sweden.
This view looking over the far northern lakeside city finds the midday
Sun with a beautiful
solar ice halo.
Naturally occurring
atmospheric ice crystals
can produce the
tantalizing halo displays,
refracting and reflecting the sunlight through their hexagonal geometry.
Still, with the Sun low and near the horizon in the clear sky,
likely sources of the ice crystals producing this
intense halo are snow cannons.
Operating at a local ski area, the snowmaking machines create
a visible plume at the top of the nearby island Froson toward
the right side of the panorama.
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:
solstice - зимнее солнцестояние
Публикации со словами: solstice - зимнее солнцестояние | |
См. также:
Все публикации на ту же тему >> |