Image: ZeissMark1
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Description: The world's first planetarium projector, the Zeiss Mark I, in the Deutsches Museum in Munich, 1923.
Title: ZeissMark1
Credit: http://www.ips-planetarium.org/planetarian/articles/twothousandyr_Dream/twothousandyr_dream.html, accessed 10/11/08
Author: Unknown, presumed to be a 1920s German photographer
Permission: Permission from original creator is unavailable. Permission from International Planetarium Society (who themselves reproduced this image in their article) is unnecessary, as IPS is not the copyright holder. (IPS was founded in 1970, more than 40 years after this photo was taken.)
License: Fair use
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