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Total solar eclipse of December 4, 2021
A total solar eclipse occurs December 4, 2021. The total phase sweeps over Antarctica, while the partial phase reaches southernmost points of three continents.
November 28, 2021
A storm on the sun, and a great week for auroras
Aurora alert in effect for the next few days: the sun sent out a halo coronal mass ejection on November 2, 2021, due to arrive at Earth on November 4.
November 4, 2021
Solar storm and aurora starting October 30
A solar storm after an eruption on the sun is carrying plasma toward Earth, which should produce northern and southern lights this weekend.
October 30, 2021
X-flare yesterday, aurora alert this weekend
The biggest solar flares are known as X-flares. Check out this image of an X-flare on the sun on October 28, 2021. It prompted an aurora alert.
October 29, 2021
Solar superflares hit Earth multiple times
Scientists found evidence for solar superflares thousands of years ago from evidence in tree rings. Could a solar superflare happen again in the future?
September 29, 2021
Aurora alert! Pair of CMEs to jolt Earth’s magnetic field
Aurora alert! A pair of coronal mass ejections will reach Earth September 1-2, 2021. Though not dangerous to satellites or the grid, they might cause auroras.
September 1, 2021
A 1967 solar storm nearly caused a nuclear war
The U.S. Air Force began preparing for war on May 23, 1967, thinking that the Soviet Union had jammed a set of American surveillance radars. But instead the powerful 1967 solar storm was to blame.
August 3, 2021
Favorite photos of ‘ring of fire’ solar eclipse
Stunning photos of the June 10, 2021 'ring of fire' solar eclipse photos.
June 11, 2021
Why is the sun’s atmosphere hotter than its surface?
The sun's atmosphere, or corona - the wispy part we see during solar eclipses - is hundreds of times hotter than the sun's visible surface, or photosphere. Why?
May 30, 2021
‘Ring of fire’ solar eclipse on June 10
The moon will sweep in front of the sun June 10 to stage 2021's first solar eclipse. A bright ring, the sun's outer rim, will surround the moon at mid-eclipse.
May 30, 2021
