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Earth’s magnetic field shields us. But it can move and flip
Earth's magnetic field helps protect life on Earth. But the magnetic poles wander, and they flip polarity every 100,000 to 1,000,000 years.
November 30, 2023
Sun activity: Aurora alert! 4 blobs of sun coming our way
Sun activity for November 30 is low, but excitement is on the way to Earth! Four coronal mass ejections should bring auroras late tonight and tomorrow night.
November 30, 2023
Sun activity archive for November 2023
Sun activity archive for November 2023. A daily record of flaring, big filaments and prominences, and other sorts of activity, on our local star.
November 1, 2023
What was the Carrington Event, and why does it matter?
The Carrington Event of 1859 was a massive geomagnetic storm triggered by an active sun. People saw auroras at low latitudes bright enough to read by.
October 22, 2023
Solar eclipse photos keep coming, and they’re awesome
Solar eclipse photos from October 14, 2023, still haven't stopped coming in. Here are a few more great ones! Thanks to all who contributed.
October 20, 2023
Eclipse photos here! Annular solar eclipse October 14, 2023
Check out amazing eclipse photos from the EarthSky community. From the partial phase to annularity to eclipse crescents on the ground, see great moments here!
October 18, 2023
Annular solar eclipse today: All you need to know
The October 14, 2023 annular solar eclipse will cross the US, Mexico, Central America, Colombia and Brazil. Maps and more here.
October 14, 2023
Seeing sunspots during the solar eclipse on October 14
If you're using safe filters during the annular or partial solar eclipse on October 14, 2023, look for sunspots around the disk of the dark moon.
October 12, 2023
Biggest solar superstorm yet, glimpsed in ancient tree rings
Researchers analyzing tree rings discovered the biggest solar superstorm known so far. If it hit today, it would wreck some critical human infrastructure.
October 11, 2023
Do solar eclipses affect Earth’s atmosphere?
Hear from a ham radio operator about how solar eclipses temporarily affect Earth's upper atmosphere, or ionosphere. Eclipses can disrupt radio signals and GPS in the region where the eclipse is passing.
October 6, 2023
