Galileo did not invent the telescope he just improved upon it.

Galileo discovered through use of his telescope that planets actually orbited the sun and moons orbit the planets. The moons of Jupiter are actually named after Galileo Galilei.

To test the theory of gravity Galileo dropped bullets off the side of the leaning tower of Piza

Galileo dropped out of college?

There is a spacecraft named after Galileo that orbits the planet Jupiter?

Galileo married and had three sons all who became physicists.

Galileo was a religious man who worked closely with the Roman Catholic Church.

Galileo was able to use his telescope to see the rough surfaces of the moon thereby proving that craters did indeed exist.

Galileo discovered the first black hole.