Forecasters have issued alerts for potential geomagnetic storms due to solar material hurtling toward Earth. Two coronal mass ejections—giant bursts of solar wind—were spotted on December 16 and are ...

NASA's space-based solar observatory STEREO-A is keeping a close eye on 'Devil Comet' 12P/Pons-Brooks as it prepares to make its closest approach to the sun — known as perihelion — on April 21. In ...