Full Sun observation taken on October 12, 2022 by EUI’s Full Sun Imager (FSI) and a zoom on the center of the Sun taken by its High-Resolution Imager (HRI). The white arrow corresponds to a distance of about 10 000 km. Three smaller structures highlighted with red, blue, and green boxes, show magnetic waves that appear as a transverse motion.

What makes the Sun’s atmosphere hotter than its surface?

A joint team of scientists from the Royal Observatory of Belgium (ROB) and KU Leuven have found that high-frequency magnetic waves may play a key role in heating the sun's atmosphere to millions of de...