This imagery of the sun captured by way of NASA's photo voltaic Dynamics Observatory from can also 17-19, 2016, shows a large dark area on the celebrity's upper half, called a coronal hole.
Coronal holes are low-density areas of the solar's environment, general because the corona. as a result of they comprise little solar fabric, they have decrease temperatures and as a result appear plenty darker than their surroundings. Coronal holes are visible in certain styles of excessive ultraviolet easy, which is customarily invisible to our eyes, however is colorized here in red for convenient viewing.
These coronal holes are vital to understanding the area environment round Earth by which our technology and astronauts commute. Coronal holes are the supply of a high-speed wind of photo voltaic particles that streams off the solar some three times faster than the slower wind in different places. while it's unclear what causes coronal holes, they correlate to areas on the sun where magnetic fields leap up and away, without looping lower back all the way down to the surface, as they do in other places.
discover additional: photo: Coronal hole on the solar