Entangled

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BIRA-IASB, Brussels, Belgium

South auroral oval and polar rain simulated in laboratory using the Planeterrella experiment (J. Lilensten et al., UJF/CNRS, Grenoble, France).
http://planeterrella.obs.ujf-grenoble.fr/English/index.php
The Planeterrella was redesigned after K. Birkeland's original terrella experiments, which in the 1900s helped him unveil the mechanisms at the origin of polar aurorae.
A magnetised aluminium sphere is placed in a vacuum chamber. An electric current is then established between the sphere (anode) and the electrode at the top of the figure (cathode) producing emissions in the visible and UV ranges.

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Credit: Cyril Simon Wedlund (distributed via imaggeo.egu.eu)

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Type Image Format JPG Size 2.8 MB Aspect 2471:3693 Width 2471 px Height 3693 px Brand Nikon Model D200 Exposure 50 mm f/1.4 2 s ISO 160 Coordinates 45.1943, 5.7316 Tint Vivid purple Submitted 10 March 2011 Taken 28 May 2010