The Sun seems like a constant, reassuring presence day to day, but it's actually fairly tempestuous and changeable. One ...

The Northern Lights may be visible in U.S. states this week, with next week's fall equinox creating ideal geometry for heightened geomagnetic activity.

An image from NASA's Solar Dynamics Observatory shows the large coronal hole in the Sun's atmosphere, while NOAA's ENLIL solar wind model shows Earth in the middle of the high speed stream of the ...

At G3 the storm is considered "strong", but it is also strengthened by something known as the "Russell-McPherron Effect".

A spectacular butterfly-shaped hole has appeared on the Sun’s surface. NASA’s Solar Dynamics Observatory captured the image on September 11. This enormous feature is venting solar wind toward Earth.

A high speed stream from a coronal hole aimed straight at the Earth has induced a strong (G3) geomagnetic storm. There may be ...

Astronomers’ hearts were a-flutter this week when a butterfly-shaped hole appeared in the Sun. The giant coronal hole was ...

A stream of solar wind escaping through a coronal hole on the sun is heading toward Earth and should arrive on Sunday, Sept.

Forecasters warn of possible G2 geomagnetic storms as a colossal coronal hole sends solar wind racing our way.

Nasa's Solar Dynamics Observatory has photographed a massive butterfly-shaped coronal hole on the Sun. Solar wind from the ...

It's more than 35 times wider than the Earth, and it could spark northern lights over the weekend over parts of North America ...

The Ketchikan Public Library’s event room on Thursday afternoon was buzzing with a group of lively youngsters excited to ...