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.

A huge sun eruption combines with speedy solar wind from a "coronal hole" for a weekend aurora show, experts predict.

Two giant holes in the Sun could create impactful space weather for Earth in early February. Recent NOAA satellite images show two coronal holes, areas on the surface of the Sun with cooler plasma.

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 ...

“Coronal holes, which are dark regions in X-ray and extreme ultraviolet images of the Sun, have open magnetic field lines and are hence important for understanding the interplanetary medium and ...