A satellite glides over Earth showcasing dramatic cloud formations and the vast expanse of space.

An invisible force field saves us

A dynamo in Earth’s liquid outer core powers a global magnetic field.

Earth: The Magnetic Shield and Auroras

Earth's night-side upper atmosphere appearing from the bottom as bands of afterglow illuminating the troposphere in orange with silhouettes of clouds, and the stratosphere in white and blue. Next the mesosphere (pink area) extends to the orange and faintly green line of the lowest airglow, at about one hundred kilometers at the edge of space and the lower edge of the thermosphere (invisible). Continuing with green and red bands of aurorae stretching over several hundred kilometers.

Deflecting the solar wind

The magnetosphere shoves charged particles from the solar wind aside, forming a long tail. During storms, particles plunge into the ionosphere and ignite auroras.

Earth: The Magnetic Shield and Auroras

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