🔭

Galileo

✨ 1564–1642, Astronomy and physics

Galileo Galilei (1564–1642) was an Italian astronomer, physicist and mathematician who played a major role in the development of modern science. Born in Pisa, he studied mathematics and became known for combining careful observation with experiments and mathematical analysis. After learning about the telescope, he improved its design and used it to study the sky. Beginning in 1609, his observations revealed mountains and craters on the Moon, numerous previously unseen stars, four moons orbiting Jupiter, and the phases of Venus.

These discoveries provided strong evidence against the traditional idea that all celestial bodies revolved around Earth. Galileo supported the heliocentric model associated with Nicolaus Copernicus, according to which Earth and the other planets orbit the Sun. His observations did not by themselves prove every detail of the heliocentric model, but they greatly strengthened the case against the older Earth-centered system. Galileo also made important contributions to physics.

Through experiments and mathematical reasoning, he investigated motion, falling bodies and the behavior of projectiles. His work helped establish the idea that physical phenomena could be described using mathematical laws and tested through observation. Galileo’s support for heliocentrism brought him into conflict with authorities of the Roman Catholic Church. In 1633, the Roman Inquisition found him suspected of heresy, and he was forced to formally renounce the position that Earth moves around the Sun.

He spent the rest of his life under house arrest. Despite this controversy, his scientific methods influenced later researchers and contributed to the development of classical physics and astronomy. Galileo is therefore remembered not only for his astronomical discoveries, but also for promoting a way of studying nature based on evidence, measurement and mathematical reasoning.

💡 Did you know?

And yet it moves! By claiming that the Earth rotated around the Sun, Galileo had big trouble with the leaders of the time. Forced to say the opposite in front of a court to avoid prison, it is said that he still whispered on his way out: 'E pur si muove!' (And yet it moves!).

Mountains through the telescope. Before Galileo, everyone thought the Moon was a perfect and smooth glass ball. Making his own telescope, he was the first human to see that it was covered with mountains and craters, just like our Earth!

The Leaning Tower of Pisa. It is said that Galileo climbed to the top of the famous Leaning Tower of Pisa to drop heavy and light objects at the same time. He proved that two objects released at the same time reach the ground together, regardless of their weight (ignoring the wind)!