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Aurora's source found by string of satellites

We have known for a long time that the Aurorae is caused by electrons streaming from the Earth's magnetic field onto the poles and then delivering a jolt of energy to gas molecules in the atmosphere. But what causes the electrons to do this in the first place? It sounds like the Themis mission may be onto something... [NASA's Themis mission finds the trigger for polar light show.]

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Posted on July 25, 2008 10:07 AM | Useful? Then Digg It

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