Fidonet Portal

From: Dan Richter (1:317/3)
To: All
Date: Mon, 29.03.21 13:00
ES Picture of the Day 29 2021
EPOD - a service of USRA

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
relevant links.

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

Related EPODs

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
Civitavecchia, Italy

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?

Earth Science Picture of the Day is a service of the Universities
Space Research Association.

--- up 3 days, 22 hours, 9 minutes
* Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (1:317/3)


This forum contains echomail areas hosted on Nightmare BBS You can browse local echomail areas, italian fidonet areas and a selection of international fidonet areas, reading messages posted by users in Nightmare BBS or even other BBSs all over the world. You can find file areas too (functional to fidonet technology). You can browse echomail areas and download files with no registration, but if you want to write messages in echomail areas, or use fidonet netmail (private messages with fidomet technology), you have to register. Only a minimal set of data is required, functional to echomail and netmail usage (name, password, email); a registration and login with facebook is provided too, to allow easy registration. If you won't follow rules (each echomail areas has its own, regularly posted in the echomail), your account may be suspended;