What were some famous things Galileo do?

Answer 1

He invented (rather modified and perfected) the telescope. He discovered the 4 biggest moons of Jupiter. His observations strengthened the heliocentric universe theory (that is the earth revolves around the sun and the earth isn't the centre of the universe).

Answer 2

Galileo Galilei was an Italian astronomer and scientist known for improving the telescope's design, demonstrating that the Earth revolves around the sun (heliocentrism), and making significant advancements in the field of physics, particularly in the study of motion and mechanics. He also faced opposition from the Catholic Church for his support of heliocentrism, which led to his trial and house arrest for the rest of his life.

Answer 3

Galileo made a great version of the microscope and telescope, was a role model, became the first known modern scientist, and with a little help discovered that the Sun was at the center of the solar system, not the Earth.

Answer 4

he created the geometric compass

Answer 5

Gravity