NASA picture reveals huge 'coronal hole' on Sun's South Pole

Image: NASA/SDO January 4, 2014 /Photography News/ There were no fireworks on the sun to welcome in the New Year and only a few C-class flares during the last day of 2014. Instead, the sun starts 2015 with an enormous coronal hole near the south pole. This image, captured on January 1, 2015 by the Atmospheric Imaging Assembly (AIA) instrument on NASA's Solar Dynamics Observatory, shows the coronal hole as a dark region in the south. Coronal holes are regions of the corona where the magnetic fiel...