Galileo Galilei was one of the most accomplished men in the world. Galileo Galilei was also interested in astronomy since he was young, and he discovered the four main Galilean moons that orbit Jupiter: Callisto, Io, Europa, and Ganymede. Before doing so, he created the first telescope. He even discovered that the Earth revolved around the sun. He was also a great mathematician and scientist. He was one of the very first astronomers.

Galileo Galilei made many discoveries with his telescope. He received his theory that the Earth revolves around the sun from a man named Copernicus, which he confirmed by studying the way that the sun affects Earth using his telescope. While discovering this, his theory that the sun creates tides on Earth failed. So he used the moon as an example, and he was correct. He made observations of the moon, the sun, and many other objects. In addition to his many talents, Galileo was also a physicist and an engineer.

Galileo’s father had wanted him to be a doctor, but Galileo had other interests. His theory that the Earth orbited the sun were not believed. Although his theory was eventually proven to be correct, the church thought otherwise and sentenced him to a lifelong period in jail. This was where Galileo spent the rest of his life, until his death. Galileo’s many discoveries in nearly all fields says much about his life as an astronomer, engineer, scientist, mathematician and physicist. It’s not just that he was all of these, but that he exceeded at nearly all of them!