Extra materiaal

Waarneming

 

Jeroen Wiedenhof

Een historisch voorbeeld

"A map of the stars, the oldest astronomical text known to mankind, appears to have been found by a student working on a summer project."

Naslag

Blackburn, Jack, Hipparchus’s lost map found by star pupil. The Times, 27 okt 22.

Murphy Paul, Annie, How To Increase Your Powers of Observation. Time, 2 mei 16.

 

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