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Астронет: Астрономическая картинка дня Молнии над вулканом Агуа http://www.variable-stars.ru/db/msg/1486471/eng |
Credit & Copyright: Sergio MontЗfar
(Pinceladas Nocturnas)
Explanation:
Have you ever watched a lightning storm in awe?
Join the crowd.
Details of what causes
lightning are still
being researched, but it is known that
inside some clouds, internal updrafts cause collisions
between ice and snow that slowly
separate charges between cloud tops and bottoms
The
rapid electrical discharges that are
lightning soon result.
Lightning usually takes a jagged course,
rapidly heating a thin column
of air to about three times the surface temperature of the
Sun.
The resulting shock wave starts
supersonically and decays into the
loud sound known as
thunder.
On average, around the world, about
6,000 lightning bolts occur between clouds and the
Earth every minute.
Pictured earlier this month in a two-image composite, lightning stems from communication
antennas near the top of
VolcАn de Agua
(Volcano of Water) in
Guatemala.
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.