The journey of astronomical telescopes began in the early 17th century when Galileo Galilei crafted his first refracting ...

Galileo Galilei's telescopic discovery of Jupiter's four moons in 1610 revolutionized astronomy and supported heliocentric ...

Galileo made himself one of the world's first telescopes and discovered the moons of Jupiter. He supported Copernicus' theory that the Earth revolved around the Sun. This brought him in conflict ...

Once described as the most important telescope in history after the original built by Galileo, the Hubble Space Telescope has offered humanity an unrivalled window into the stars around us. But 35 ...