Galileo’s Sunspot Drawings


http://es.rice.edu/ES/humsoc/Galileo/Things/g_sunspots.html

ガリレオのスケッチした太陽の黒点。

In 1612 during the summer months, Galileo made a series of sunspot observations which were published in Istoria e Dimostrazioni Intorno Alle Macchie Solari e Loro Accidenti Rome (History and Demonstrations Concerning Sunspots and their Properties, published 1613).