Aurora borealis (or the northern lights) is a naturally occurring, beautiful light display caused by "the collision of charged particles directed by the Earth's magnetic field." Below, an electrifying display of time-lapse footage taken in Tromsø, Norway, by Tor Even Mathisen. Shot with the Canon EOS 5D Mark II.
Planning on seeing something just as stunning? You can learn to capture it in time-lapse, too.