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Астронет: Астрономическая картинка дня Перигелий 2023 года и Солнце http://variable-stars.ru/db/msg/1871551/eng |
Credit & Copyright: Peter Ward
(Barden Ridge Observatory)
Explanation:
Perihelion
for 2023,
Earth's closest approach to the Sun,
was on January 4 at 16:17 UTC.
That was less than 24 hours after this
sharp image of the Sun's
disk
was recorded with telescope and
H-alpha filter from Sidney, Australia, planet Earth.
An
H-alpha filter
transmits a characteristic red light from hydrogen atoms.
In views of the Sun it emphasizes the Sun's chromosphere,
a region
just above
the solar photosphere or normally visible solar surface.
In this H-alpha image of the
increasingly
active Sun
planet-sized sunspot regions are dominated
by bright splotches called plages.
Dark filaments of plasma
snaking across the solar disk transition
to bright prominences when seen
above the solar limb.
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.