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 news for July 26, 2024. Moderate activity continues with 2 M flares. A geomagnetic storm this morning should be followed by another overnight.
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.
Sun activity archive for May 2023. A daily record of flaring, big filaments and prominences, and other sorts of activity, on our local star.
Sun activity archive for April 2023. A daily record of flaring, big filaments and prominences, and other sorts of activity, on our local star.
Sun activity archive for March 2023. A daily record of flaring, big filaments and prominences, and other sorts of activity, on our local star.