If you see the northern lights overhead, chances are you are in a chilly, polar climate. But the cold-weather delights—also known as aurora borealis—high above you are actually an important source of heat. A new NASA mission hopes to fly through an active aurora to study this energy exchange process up close. The launch window for Ion-Neutral Coupling during Active Aurora, or INCAA mission, opens at the Poker Flat Research Range in Poker Flat, Alaska, on March 23.