Today's Image

Halo around the sun over Normandy, France

Posted by

and

April 24, 2014

EarthSky Facebook friend Jean Marie Andre Delaporte captured this image of a halo around the sun in Normandy, France on April 23, 2014. Thank you, Jean Marie!

This is a classic solar halo, what scientists call a 22-degree halo. Halos like this one can be seen around the world, throughout the year, and around either the sun or moon. These halos are caused by both refraction, or splitting of light, and also by reflection, or glints of light from ice crystals high in Earth’s atmosphere. The crystals have to be oriented and positioned just so with respect to your eye, in order for the halo to appear.

What makes a halo around the sun or moon?

Bluesky Facebook Threads Buffer

Posted

April 24, 2014

in

Today's Image

Deborah Byrd

View Articles

About the Author:

Deborah Byrd (asteroid 3505 Byrd) helps edit EarthSky.org and is a frequent host of EarthSky videos. Deborah created the EarthSky radio series in 1991 and founded EarthSky.org in 1994. Prior to that, she had worked for the University of Texas McDonald Observatory since 1976, and created and produced their Star Date radio series. She has won a galaxy of awards from the broadcasting and science communities, including having an asteroid named in her honor in 1990, a Public Service Award from the National Science Board in 2003, and the Education Prize from the American Astronomical Society in 2020. A science communicator and educator since 1976, Byrd believes in science as a force for good in the world and a vital tool for the 21st century. "Being an EarthSky editor is like hosting a big global party for cool nature-lovers," she says.