If you saw the northern lights — either with your own eyes or with the help of your phone — you may have noticed an array of colors. But what causes the different shades of greens, reds ...

The northern lights surprise stargazers by appearing in many forms—from patches or scattered clouds, to streamers, arcs, rippling or dancing curtains. The lights move and change shape and color.

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

Residents in several Northern states may be able to catch the dazzling display in the night sky tonight and/or tomorrow. Will we see it in New Jersey?