Northern lights could be visible across the U.S. this weekend because of a severe geomagnetic storm. Here's how you could see it.
The aurora borealis — aka the northern lights — are the result of disturbances in the magnetosphere caused by solar wind. Due to a series of X-class solar flares (the most powerful category flare) and coronal mass ejections (CMEs) that began on May 8, the lights will be visible in parts of the U.S. beginning Friday around 8 P.M. ET.