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Астронет: Астрономическая картинка дня Восход тройного Солнца http://variable-stars.ru/db/msg/1216513/eng |
Credit & Copyright: Jim Hoida
Explanation:
Today, the Sun rises due east at
the Equinox,
a geocentric astronomical event that occurs twice a year.
To celebrate, consider this view of the rising Sun and
a lovely set of
ice halos
recorded on a cold winter morning
near Green Bay, Wisconsin, USA,
planet Earth.
Produced by sunlight shining through common atmospheric
ice crystals with hexagonal cross-sections,
such halos can actually be seen more often than
rainbows.
The remarkable sunrise picture captures
a beautiful assortment of the types
most
frequently seen,
including a sun pillar (center)
just above the rising
Sun surrounded by a 22 degree halo arc.
Completing a triple sunrise illusion,
sundogs appear at the
far left and far right edges of the 22 degree arc.
An upper tangent
arc is also just visible at the very top of the view.
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.