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Астронет: Астрономическая картинка дня Взрывы на голубом Солнце http://www.variable-stars.ru/db/msg/1287763/eng |
Credit & Copyright: Alan Friedman
(Averted Imagination)
Explanation:
Our Sun is not a giant blueberry.
Our Sun can be made to
appear similar
to the
diminutive fruit, however,
by imaging it in a
specific color
of extreme violet light called
CaK
that is emitted by the very slight abundance of ionized Calcium in the
Sun's atmosphere,
and then false color-inverting the image.
This solar depiction
is actually scientifically illuminating as a level of the Sun's
chromosphere
appears quite prominent, showing a crackly textured surface, cool
sunspots appearing distinctly bright,
and surrounding hot active regions
appearing distinctly dark.
The Sun is currently near the
maximum
activity level in its 11 year cycle, and has emitted
powerful flares over the past week.
During times of high activity, streams of energetic particles
from Sun may impact the
Earth's magnetosphere and
set off
spectacular auroras.
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.