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The Exploration of the Earth's Magnetosphere"

Kristian Birkeland with one of his experiments

Kristian Birkeland at his vacuum chamber.

(This was not the experiment where he simulated auroral electrons guided magnetically towards the magnetic poles.)

Kristian Birkeland with one of his experiments

Kristian Birkeland at his vacuum chamber. (This was not the experiment where he simulated auroral electrons guided magnetically towards the magnetic poles.)

Kristian Birkeland at his vacuum chamber.

(This was not the experiment where he simulated auroral electrons guided magnetically towards the magnetic poles.)