As a professor of astronomy at University of Pisa, Galileo was required to teach the accepted theory of his time that the sun and all the planets revolved around the Earth.

• 作为比萨大学的一名天文学教授，伽利略被迫教授学生当时人们普遍接受的地心说理论，就是太阳和其他的行星都围绕地球转。