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Астронет: Астрономическая картинка дня Лунная корона с Юпитером и Сатурном http://variable-stars.ru/db/msg/1721004/eng |
Credit & Copyright: Alessandra Masi
Explanation:
Why does a cloudy moon sometimes appear colorful?
The effect, called a lunar
corona,
is created by the quantum mechanical
diffraction of light around individual, similarly-sized water droplets in an
intervening
but mostly-transparent cloud.
Since light of different colors has
different wavelengths,
each color diffracts differently.
Lunar Coronae are one of the few
quantum mechanical color effects that can be
easily seen with the unaided eye.
Solar coronae are also sometimes evident.
The featured composite image was captured a few days before the
close
Great
Conjunction
between
Saturn
and
Jupiter
last
month.
In the foreground, the
Italian village of
Pieve
di
Cadore
is visible in front of the
Sfornioi Mountains.
New:
APOD is now available in Taiwanese from National Central University
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.