Galileo used a telescope to discover the four major moons of Jupiter. This was very controversial at the time because the general view was that all bodies in the Universe revolved around the Earth.
You can learn more about Galileo by clicking here
Galileo used a telescope to discover the four major moons of Jupiter. This was very controversial at the time because the general view was that all bodies in the Universe revolved around the Earth.
You can learn more about Galileo by clicking here