Sun activity: Giant coronal hole spraying Earth!

Sun activity for December3 is calmer but not for long. A giant coronal hole is spraying Earth meaning more auroras soon!

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.

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.

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.

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.

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!

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.

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.

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.

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.