The aurora australis, or southern lights, glimmer green over Antarctica in this picture taken four days after a massive solar flare. To capture it, NASA researchers obtained readings from the now-defunct IMAGE satellite, which monitored Earth's magnetic field. Overlaying the data onto a "Blue Marble" satellite photograph of Earth resulted in both the image above and an animation of the solar storm's effects on Earth's atmosphere. Credit: NASA, Earth Observatory | c. 2006 #NASA #southernlights #antarctica #Earth #imaging