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Астронет: Астрономическая картинка дня Полярное сияние над Исландией http://variable-stars.ru/db/msg/1262692/eng |
Credit & Copyright: Daniel Lopez
(El Cielo de Canarias)
Explanation:
If you see a sky like this -- photograph it.
Three nights ago in
Iceland, an
adventurous photographer (pictured) chanced across a
sky full of aurora and did just that.
Afterwards, by stitching together five smaller photographs,
the entire aurora-lit sky was recreated in this 180-degree panorama taken from
VatnajЖkull glacier.
Auroras
are sparked by
energetic particles from the
Sun impacting the
magnetic environment
around the Earth.
Resultant energetic particles such as
electrons and
protons
rain down near the Earth's poles and impact the air.
The impacted
air molecules obtain
excited electrons, and when electrons in
oxygen molecules fall back to their ground state,
they emit green light.
Auroras
are known to have many
shapes and
colors.
News Flash -- Supernova in
M95:
See recent images
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.