invented the microscope wrote a book about the planets created a model of the solar system made improvements to the telescope
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: In the 1600s, Galileo Galilei studied the moons of Jupiter. What did Galileo do to make better observations?
Possibilities:
- invented the microscope
- wrote a book about the planets
- created a model of the solar system
- made improvements to the telescope

made improvements to the telescope