Friday, July 25, 2008

Secret of Colorful Auroras Revealed

Secret of Colorful Auroras Revealed: "A flotilla of NASA probes has solved the 30-year mystery behind the most colorful aurora displays on Earth and the explosive magnetic 'substorms' that spawn them.

NASA's five THEMIS spacecraft in different orbits around Earth spotted the trigger for the substorms, powerful energy bursts in the planet's magnetic field that can interfere with satellites, power grids and supercharge the aurora borealis, also known as the northern lights."