The Millionth Picture From The International Space Station

In what is a pretty incredible milestone, astronaut Don Pettit provided us with the millionth picture taken from the International Space Station.

The pic features a green strip of aurora light, which  is caused by the collision of energetic charged particles with atoms in the high altitude atmosphere.

Science lesson over for today.

To date, space station astronauts have snapped enough photos to fill at least 319 single-layer DVDs, or 60 single-layer Blu-ray discs, NASA officials said.