coronal hole

June 20, 2021
USPS Stamps Featuring NASA's Solar Dynamic Observatory

Super Hot Stamps from the USPS – SDO Sun Science Stamps

What a great way to celebrate the Sun's importance in our lives—a stamp series from the United States Postal Service. #SunScienceStamps #NASASunScience
May 29, 2013

Giant Hole in the Solar Corona!

Aptly enough, we call these coronal holes. These dark patches in the sun million plus degree corona are areas where the solar atmosphere rapidly streams away from the sun. This stream of particles from the solar atmosphere is called the
January 16, 2011

When the Sun has Holes We Often Get Aurora

Two coronal holes that develop over several days stand out in this image and video clip of the Sun from SDO’s AIA instrument (Jan. 9-12, 2010). In the extreme UV wavelength of 193 Angstroms, one dark coronal hole intensifies just