Correct. The answer is c. Galileo’s account of the moon began with a discussion of improvements he made on a Dutch telescope design.

Incorrect. The answer is c. Galileo’s account of the moon began with a discussion of improvements he made on a Dutch telescope design.

1. What technological innovation was essential to Galileo’s discovery?

Correct. The answer is b. Medieval cosmology contrasted heavenly perfection with earthly perfection. Galileo’s discovery of the irregularity of the moon’s surface challenged this basic assumption.

Incorrect. The answer is b. Medieval cosmology contrasted heavenly perfection with earthly perfection. Galileo’s discovery of the irregularity of the moon’s surface challenged this basic assumption.

2. According to medieval cosmography, which of these is true?