A daily update by email. Science news, great photos, sky alerts.
A large ring or circle of light around the sun or moon is called a 22-degree halo. They are caused by high, thin cirrus clouds drifting high above your head.
We get many messages throughout each year from people who’ve just spotted a halo, or ring, around the sun or moon.
Solar halo seen in Indianapolis, Indiana by Jolynn Keutzer Bales. Thank you Jolynn!
Sun activity archive for December 2024. A daily record of flaring, big filaments and prominences, and other sorts of activity, on our local star.
Scientists studying the disk of debris around bright star Vega have found it to be almost totally smooth, with no sign of any planets.
Sun activity archive for October 2024. A daily record of flaring, big filaments and prominences, and other sorts of activity, on our local star.
Sun activity archive for September 2024. A daily record of flaring, big filaments and prominences, and other sorts of activity, on our local star.
Sun activity archive for July 2024. A daily record of flaring, big filaments and prominences, and other sorts of activity, on our local star.
Sun activity archive for June 2024. A daily record of flaring, big filaments and prominences, and other sorts of activity, on our local star.
Sun activity archive for May 2024. A daily record of flaring, big filaments and prominences, and other sorts of activity, on our local star.
Sun activity archive for April 2024. A daily record of flaring, big filaments and prominences, and other sorts of activity, on our local star.
Did you get to see epic AR3590? If not, here's the story of a sunspot that has made history! And check out our YouTube videos as well.
Sun activity archive for March 2024. A daily record of flaring, big filaments and prominences, and other sorts of activity, on our local star.
Sun activity archive for February 2024. A daily record of flaring, big filaments and prominences, and other sorts of activity, on our local star.
Sun activity archive for January 2024. A daily record of flaring, big filaments and prominences, and other sorts of activity, on our local star.
Sun activity archive for December 2023. A daily record of flaring, big filaments and prominences, and other sorts of activity, on our local star.
Sun activity archive for November 2023. A daily record of flaring, big filaments and prominences, and other sorts of activity, on our local star.
Sun activity archive for September 2023. A daily record of flaring, big filaments and prominences, and other sorts of activity, on our local star.
Sun activity archive for July 2023. A daily record of flaring, big filaments and prominences, and other sorts of activity, on our local star.
Sun activity archive for June 2023. A daily record of flaring, big filaments and prominences, and other sorts of activity, on our local star.