Galileo Galilei first used the "new" telescope in 1609
Galileo Galilei didn't actually invent the telescope but he made vast improvements to the first design.
Galileo Galilei invented a number of things. One of them was a telescope that allowed him to discover Saturn's first four moons. Galileo was an Italian astronomer.
The first telescope was used by Galileo Galilei (first used in 1609) to see the faraway planets and stars of the galaxy.
Galileo Galilei.
Galileo Galilei
mars
Padua
Galileo Galilei.
Galileo Galilei . He only helped support the theory through his observations , he didn't invent the model, Copernicus did.
•Galileo Galilei was the first person to invent the thermometer
Galileo Galilei