Northern Lights Mystery Gets Solved

Themis was the blindfolded Greek goddess of order and justice. It's also a NASA-funded mission which stands for Time History of Events and Macroscale Interactions during Substorms - and, using it, UCLA space scientists and colleagues have identified the mechanism that triggers substorms in space; wreaks havoc on satellites, power grids and communications systems; and leads to the explosive release of energy that causes the spectacular brightening of the aurora borealis, also known as the northern lights. For 30 years, there have been two competing theories to explain the onset of these substorms, which are energy releases in the Earth's magnetosphere, said Vassilis Angelopoulos, a UCLA professor of Earth and space sciences and principal investigator of THEMIS. Read More...

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