File:Karl Schwarzschild and Ejnar Hertzsprung (1909).jpg

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English: Karl Schwarzschild (left) and Ejnar Hertzsprung in professorial gowns in front of the Göttingen Observatory building sometime in 1909.
Date
Source http://www.leosondra.cz/en/first-hr-diagram/
Author The Göttingen Observatory photo, courtesy Hartmut Grosser.

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Date/TimeThumbnailDimensionsUserComment
current04:03, 30 November 2015Thumbnail for version as of 04:03, 30 November 2015768 × 1,088 (57 KB)MeliriusBetter resolution from ''John B. Hearnshaw'' The Analysis of Starlight: Two Centuries of Astronomical Spectroscopy, Cambridge University Press, 2014, ISBN 1107031745, 9781107031746, p. 129.
03:42, 30 November 2015Thumbnail for version as of 03:42, 30 November 2015302 × 430 (15 KB)MeliriusUser created page with UploadWizard

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