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Астронет: Астрономическая картинка дня Северное сияние над Аляской http://variable-stars.ru/db/msg/1297862/eng |
Credit & Copyright: LeRoy Zimmerman
(TWAN)
Explanation:
A remarkably intense auroral band flooded the northern night with
shimmering colors on December 7.
The stunning
sequence captured here was made with a camera
fixed to a tripod under cold, clear skies near Ester, just outside
of Fairbanks, Alaska.
Left to right, spanning a period of about 30 minutes, the panels follow
changes in the dancing curtains of northern lights extending
to altitudes
of over 100 kilometers in a band arcing directly overhead.
The panels span 150 degrees vertically, covering about 500 kilometers of
aurora laying across the sky from edge to edge.
The auroral activity was triggered by a moderate level geomagnetic storm,
as a high speed solar wind stream buffeted
planet Earth's magnetosphere.
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.