A powerful solar storm could do more than light up the skies—it could knock out GPS systems across the globe. Scientists are warning that intense solar activity from the Sun has the potential to ...

The sun rises each day, but the amount of sunlight reaching Earth’s surface is not as constant as we might think. A new study ...

The northern lights were visible farther south than normal Tuesday, April 15, and they'll be visible again for some residents tonight, April 16.