Northern Lights, Alaska. Photo © Jim Doty, Jr.

The same process the creates the Northern Lights is also responsible for creating an odd assortment of sounds that earth “beams” out into space in the form of radio waves. The ionosphere prevents these sounds from reaching earth which is a good things, since they would drown out every radio station on the planet with a signal 10,000 times more powerful than the strongest military radio transmissions.

You can listen here at Space.com (you have to listen to one of those annoying mini-ads before the video plays).