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| Keywords: ARAGO Francois Astronomie Populaire T2 djvu 0201 Fig163.png fr Fig 163 ” Image photographique du Soleil obtenue en un soixantième de seconde le 2 Avril 1845 à 9h 45m par MM Fizeau et Foucault Daguerrotype image of the Sun using a 1/60 second exposure taken on 2 April 1845 at 9 45 AM by Hippolyte Fizeau and Léon Foucault This is the earliest known photograph that clearly shows the presence of sunspots on the Sun's surface 2012-05-05 Extrait de Astronomie populaire Tome 2 de François ARAGO sur Wikisource Creator François Arago PD-old-100 Uploaded with UploadWizard Illustrations for Arago's Astronomie populaire | ||||
