Date: Mon, 29.03.21 13:00
ES Picture of the Day 29 2021
The Earth Science Picture of the Day (EPOD) highlights the diverse processes
and phenomena which shape our planet and our lives. EPOD will collect and
archive photos, imagery, graphics, and artwork with short explanatory
captions and links exemplifying features within the Earth system. The
community is invited to contribute digital imagery, short captions and
Solar Halo and Lunar Halo Observed from Zsa'mbe'k, Hungary
March 29, 2021
Photographer: Tamas Abraham
Summary Author: Tamas Abraham; Jim Foster
Featured above are two photos of 22-degree halos that I observed
from Zsa'mbe'k, Hungary, a few weeks back. The top photo shows a solar
halo taken on January 18, 2021. At center are the ruins of the 900-year
old Premontre monastery church that was used here to mask the
Sun, permitting the halo itself to be more easily seen. The lower photo
shows a lunar halo taken on January 25. Note that the stars of
Orion are twinkling through the halo at the 4:00 position.
Whether observed at night or day, 22-degree halos (22-degrees is the
halo’s radius) form when randomly oriented, pencil-shaped ice
crystals refract sunlight or moonlight. On occasion, these crystals are
free-falling in the atmosphere but most often they compose cirrus
clouds. In order for the complete halo to be seen, the Sun or Moon
must be at least 22-degrees above the horizon.
Photo Details: Canon EOS 400D camera; Canon EF-S 10-22 USM lens.
* Zsa'mbe'k, Hungary Coordinates: 47.5474, 18.7214
Solar Halo and Lunar Halo Observed from Zsa'mbe'k, Hungary Double
Rainbow on Evia, Greece Twilight from Mount Penteli, Greece
Upper Tangent Arc and Sun Pillar Above Orsta, Norway
Val-d'Ise're Moonbow Green Flash Sequence Observed from
Atmospheric Effects Links
* Atmospheric Optics
* Color and Light in Nature
* The Colors of Twillight and Sunset
* Refraction Index
* Image Gallery: Atmospheric Effects
* What is a Rainbow?
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