NASA’s THEMIS sees Auroras move to the rhythm of Earth’s magnetic field

The majestic auroras have captivated humans for thousands of years, but their nature — the fact that the lights are electromagnetic and respond to solar activity — was only realized in the last 150 years. Thanks to coordinated multi-satellite observations and a worldwide network of magnetic sensors and cameras, close study of auroras has become possible over recent decades. Yet, auroras continue to mystify, dancing far above the ground to some, thus far, undetected rhythm.

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