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Астронет: Астрономическая картинка дня Бурлящее оранжевое Солнце http://variable-stars.ru/db/msg/1245425/eng |
Credit & Copyright: Alan Friedman
(Averted Imagination)
Explanation:
Even a quiet Sun can be a busy place.
And over the deep
Solar Minimum
of the past few years, our Sun has been
unusually quiet.
The above image, taken last week in a
single color of light called
Hydrogen Alpha and then
false colored, records a great amount of detail of the simmering surface of
our parent star.
The gradual brightening towards the Sun's edge in this color-inverted image, called
limb darkening, is caused by increased absorption of
relatively cool solar gas.
Just over the Sun's edges, several
prominences are visible,
while two prominences on the Sun's face are
seen as light streaks just above and right of the image center.
Two particularly active areas
of the Sun are marked by dark
plages.
In contrast to recent
quiet times,
our Sun is moving toward Solar Maximum, and
for years will likely
appear
much
more
active.
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.