U-2 pilot and instructor and avid photographer Ross Franquemont took these snaps of the spectacular aurora borealis — or, northern lights, while flying the legendary U-2 spycraft.

“I had no idea how fast the aurora moved and changed. It danced around, changing shape several times a second. That made it a challenge for the photographer in a spacesuit sitting in shaking metal can moving 500 mph,” Ross told The Aviationist about the photos.

The northern lights, which also occur in the Southern Hemisphere — the “Aurora Australis” — have always fascinated mankind. They develop as a result of a solar storm that originates from the sun and blows a stream of charged electrons toward Earth.

The process creates a natural light phenomenon when the electrons collide with the Earth’s upper atmosphere. The colors green and red display between 60 to 150 miles in altitude when the electrons hit atoms of oxygen. Meanwhile, the blue and purple/violet colors occur up to 60 miles away from Earth’s magnetic field.