Contribute by mql on May 13, 2008.
Description: When the solar particles are stopped by the atmosphere, they collide with the atmospheric gases present, and the collision energy between the solar particle and the gas molecule is emitted as a photon - a light particle. And when you have many such collisions, you have an aurora - lights that may seem to move across the sky.
In order for an observer to actually see the aurora with the naked eye, about a 100 million photons are required.
Description: When the solar particles are stopped by the atmosphere, they collide with the atmospheric gases present, and the collision energy between the solar particle and the gas molecule is emitted as a photon - a light particle. And when you have many such collisions, you have an aurora - lights that may seem to move across the sky.
In order for an observer to actually see the aurora with the naked eye, about a 100 million photons are required.
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