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Астронет: Астрономическая картинка дня Ночное свечение http://variable-stars.ru/db/msg/1318865/eng |
Credit & Copyright: Phil Hart
Explanation:
What shines in
the world
at night?
Just visible to the eye, a rare electric blue glow spread
along the shores of Victoria Lake on January 16, 2013.
Against reflections of a light near the horizon,
this digitally stacked long exposure
recorded the bioluminescence
of noctiluca scintillans,
plankton stimulated by the lapping waves.
Above, the night skies of the Gippsland Lakes
region, Victoria, Australia shine with a fainter
greenish airglow.
Oxygen atoms in the upper atmosphere, initially
excited by ultraviolet sunlight, produce the more widely seen fading
atmospheric
chemiluminescence.
Washed out by the Earth's rotation, the faint band
of the southern summer Milky Way stretches from the horizon
as star trails circle the South Celestial Pole.
Watch:
Meteors vs. Supermoon
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.