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

(For more on the controversy Galileo spawned, see His Big Mistake.) Building a better refractor The spyglass-turned-telescope had limitations, some of which Galileo was able to design around.

Galileo Galilei – often referred to just ... as a means of uncovering the secrets of nature. And his discoveries with the telescope changed our understanding of the universe.

Galileo Galilei was born on February 15 ... After years of gazing at the night sky with his telescope, he published a book, The Sidereal Messenger, about what he’d seen, such as moons circling ...

The four largest – Io, Europa, Ganymede and Callisto – were discovered by Galileo Galilei in 1610 when he pointed the first astronomical telescope at the Moon, Venus and the planet Jupiter in quick ...

On a cold January day in 1642, Galileo Galilei took his last breath ... That's what Galileo did when he pointed his telescope at the heavens and declared that Earth wasn't the centre of the ...

Astrophotographers use sophisticated imaging technology to take and edit photographs that bring us the cosmos with startling ...

Vincenzio Galilei, his father, was also a musician, with original views, as well as being something of a mathematician. Galileo was to ... he succeeded in making a telescope of the sort familiar ...

The original structure provided the optimal setting for Galileo Galilei's presentation of the telescope; it also served as a stage for tight rope walkers who would humor the doge (the highest ...