Events
Claudius Ptolemy
was bornClaudius Ptolemy
diedClaudius Ptolemy
created the idea of
HeliocenterismNicolaus Copernicus
was bornNicolaus Copernicus
published a detailed
astronomical manuscript
on heliocenterismNicolaus Copernicus
diedNicolaus Copernicus
elected cannon of a
cathedralGalileo Galilei
was bornGalileo published his Letters on Sunspots, based on his observations
of the dark spots on the Sun that are caused by intense magnetic activityGalileo heard about a Dutch device for making distant objects look nearer. In about a month, Galileo Galilei invented the first telescope
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