How did Galileo discover sunspots?
Galileo saw sunspots by looking at the Sun through the telescope he had just invented. Luckily for him, his telescope was so primitive, he did not blind himself! You should NEVER look at the Sun through a telescope without special filters to protect your eyes! Galileo was not the first person on Earth to see sunspots. There are records of sunspots observed through heavy clouds in China in the 13th century. There is no record of how blind the observers were after this…
