Galileo Galelei improved telescopes and discovered the largest satellites of Jupiter.
Answer: Option A
Step-by-step explanation:
Falileo Galelei was one of the finest physicist, astronomer, mathematician, and an engineer. He was the first person to use telescope in astronomy which lead to many interesting inventions in space.
Jupiter was one of the ground breaking invention in his career which was found with the help of his techniques in telescope. He also found that all the planets in the solar system revolve around the sun.