Auroras are possible over the U.S. tonight (March 25) as a "moderate" geomagnetic storm hits Earth. UPDATE: The Northern ...

NASA's Solar Dynamics Observatory just spotted a massive hole on the sun called a coronal hole ... speed solar winds that can sometimes disrupt satellite and radio communication satellites.

Near real-time preliminary data from NOAA's first Compact Coronagraph (CCOR-1), a powerful solar telescope onboard the ...

The Northern Lights could be visible as far south as New York and Idaho tonight due to a "coronal hole" sending streams of charged particles toward Earth. "Watches of this level are not uncommon ...

Because of this escaping material, coronal holes appear as cooler, dark patches when viewed in ultraviolet and soft X-ray images of the sun. Coronal holes may superficially appear to be similar to ...