In photos: Northern lights dazzle skies across the U.S. and world

The northern lights returned to skies across the U.S. and the world over Thursday night after a powerful solar storm triggered stunning celestial displays also known as aurora borealis. The big picture: Extreme G4 geomagnetic conditions were observed Thursday and remained overnight, per NOAA's Space Weather Prediction Center, which warned the storm had the potential to disrupt communications and the electric power grid. The northern lights...