22° solar halo

Christine Irakleous
Location of photo
Thessaloniki, Greece
Date/Time of photo
Canon 600D
Four days ago, during a solar observation, a 22° halo suddenly appeared above Thessaloniki. This ring of light is an optical phenomenon, which takes place when sunlight is refracted through millions of tiny hexagonal ice crystals in the atmosphere, usulally found within thin, high-level clouds like cirrostatus.
All comments must follow the Sky & Telescope Terms of Use and will be moderated prior to posting. Please be civil in your comments. Sky & Telescope reserves the right to use the comments we receive, in whole or in part, and to use the commenter’s username, in any medium. See also the Terms of Use and Privacy Policy.


This site uses Akismet to reduce spam. Learn how your comment data is processed.