Open Days of the astronomical institutes on Königstuhl mountain on July 22, 2012: A crowd of more than 4000 visited the Haus der Astronomie, the Max Planck Institute for Astronomy and Landessternwarte on this day.

Open Days of the astronomical institutes on Königstuhl mountain on July 22, 2012: A crowd of more than 4000 visited the Haus der Astronomie, the Max Planck Institute for Astronomy and Landessternwarte on this day.

July 22, 2012

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