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Астронет: Астрономическая картинка дня Полная круговая радуга над Норвегией http://variable-stars.ru/db/msg/1865608/eng |
Credit & Copyright: Lukas Moesch
Explanation:
Have you ever seen an entire rainbow?
From the ground, typically, only the top portion of a rainbow is visible because directions toward the ground have fewer raindrops.
From the air, though, the entire 360-degree circle of a
rainbow is more commonly visible.
Pictured here,
a full-circle rainbow was captured over
the
Lofoten Islands of
Norway
in September by a drone passing through a rain shower.
An observer-dependent
phenomenon
primarily caused by the
internal reflection
of sunlight by raindrops, the rainbow has a full
diameter of 84 degrees.
The Sun is in the exact
opposite direction from the rainbow's center.
As a bonus,
a second rainbow
that was more faint and color-reversed was visible outside the first.
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.