When it comes to nature’s light show, Northern Lights are a spectacle that can enthrall anyone. The red, green and blue lights waltzing in the sky is simply mesmerising. Until now, the inner workings of this phenomenon has been a mystery. But now, scientists using special sensors aboard Japan’s Exploration of energisation and Radiation in Geospace (ERG) satellite, also called ‘Arase’, have decoded the mystery behind this light show.
According to their observation, the answer lies in the interaction between electrons and plasma waves which takes place in the Earth’s magnetosphere, which is a layer outside the Earth which protects it from cosmic radiation.
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