|
Credit: J. P. Dwyer
Explanation:
Sometimes, near midnight,
auroras suddenly stop. Nobody knows why.
This
nightside gap in
aurora was
confirmed recently by D. Chua
(U. Washington) and colleagues in data from the
Ultraviolet Imager onboard the
Polar spacecraft.
The gap appears from space as a
slight break in a more
full auroral arc
surrounding a magnetic pole of the Earth.
Pictured above are clouds and
auroras occurring last August near
Wildcat Mountain in
Wisconsin.
Tomorrow's picture: A New Storm In The Solar System
|
January February March April May June July August September October November December |
| ||||||||||||||||||||||||||||||||||||||||||||||||
NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.
Based on Astronomy Picture
Of the Day
Publications with keywords: aurora
Publications with words: aurora
See also: