This video was created using images taken by astronauts aboard the International Space Station on January 29, 2012. This nighttime pass starts just southwest of Mexico, sweeps over the east coast of the United States, and ends to the northeast of Newfoundland. The points of light, from towns and cities, show how people are distributed. The northern lights (greenish glow) dance in the upper atmosphere as the pass finishes near Newfoundland. Also known as aurora borealis, this colorful phenomenon is caused by high-energy particles from the Sun colliding with the Earth's magnetic field. Video courtesy of Earth Sciences and Image Analysis Laboratory, NASA/Johnson Space Center
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