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Image for: Goethes weiteres Erbe


Der Heliograph der Klimastation der Universität Jena misst die tägliche Sonnenscheindauer. Die Glaskugel wirkt wie ein Brennglas: Sie bündelt das Sonnenlicht, das sich in einen mit einer Zeitskala versehenen Papierstreifen einbrennt.
Der Heliograph der Klimastation der Universität Jena misst die tägliche Sonnenscheindauer. Die Glaskugel wirkt wie ein Brennglas: Sie bündelt das Sonnenlicht, das sich in einen mit einer Zeitskala versehenen Papierstreifen einbrennt.

Foto: Jürgen Scheere/FSU

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