
Nils Ribi posted this photo at EarthSky Facebook and wrote:
I’ve been noticing these light pillars the last couple nights around Sun Valley, Idaho. These are from some brightly lit trees around 11:30 pm on January 1, 2017.
Light pillars form when a bright light source reflects off the surfaces of millions of falling ice crystals in the sky. The ice crystals are associated with thin, high-level clouds, for example, cirrostratus clouds. The crystals have roughly horizontal faces. They fall through Earth’s atmosphere, rocking slightly from side to side, and the light reflecting from them are what creates light pillars, and also sun pillars.
Thank you, Nils!
Like what you read?
Subscribe and receive daily news delivered to your inbox.
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
More from
Deborah Byrd
View All
Could the Taurid meteors bring a risk of airbursts in 2026?
October 30, 2026
Daylight Time ends Sunday: 7 tips to help you adjust
October 30, 2026
Visible planets and night sky guide for October and November
October 30, 2026
Spooky ghost lights: Believe in them if you dare
October 29, 2026
