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Астронет: Астрономическая картинка дня Северное сияние и дерево http://variable-stars.ru/db/msg/1378494/eng |
Credit & Copyright: Alyn Wallace Photography
Explanation:
Yes, but can your tree do this?
Pictured
is a visual coincidence between the dark branches of a nearby tree and bright glow
of a distant aurora.
The beauty of the
aurora -- combined with how it seemed to mimic a
tree right nearby -- mesmerized the photographer to such
a degree that he momentarily forgot to take pictures.
When viewed at the right angle, it seemed that this tree had aurora for leaves!
Fortunately, before the aurora morphed into a
different
overall
shape,
he came to his senses and capture the awe-inspiring
momentary coincidence.
Typically triggered by
solar explosions,
aurora are caused by high energy
electrons
impacting the
Earth's atmosphere around 150 kilometers up.
The unusual Earth-sky collaboration was witnessed earlier this month in
Iceland.
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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.