Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Colorful auroras ...

A rare geomagnetic storm caused auroras around the world this week. Here's what happened, and what to expect in Connecticut's ...

The northern lights are a luminous glow seen around the magnetic poles of the northern and southern hemispheres, according to the University of Alaska Fairbanks Geophysical Institute. Known for ...