Auroras are produced by differences in temperature between the mesosphere and thermosphere extremely cold temperatures around the poles ultraviolet radiation hitting the stratosphere interactions among thermospheric gases and free electrons

Interactions among thermospheric gases and free electrons.

Explanation:

Aurora borealis is a natural light display that results from interactions among thermospheric gases and free electrons. These disturbances in the magnetosphere are a consequence of solar wind. Auroras occur within bands around both polar regions, and are also known as polar lights, northern lights (aurora borealis) and southern lights (aurora australis).

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