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

Well, any of us who has ever looked through a telescope could say the same, for the two principal types in use today were developed by giants: the refractor by Galileo and the reflector by Newton.

The Stephens observatory, located on the roof of Carnegie, houses a 12-inch Newtonian reflecting telescope, built by Roscoe G. Stephens of Kennebunk, Maine. Stephens gifted the telescope to the ...

His study and understanding of light, the invention of the reflecting telescope (1668), and his revelation in his Principia of the mathematical ordering of the universe are all represented on his ...

the invention of the reflecting telescope described by James Gregory and built in a different form by Isaac Newton (Fig. 1b), and the invention of the achromatic doublet by John Dolland and others ...

The Sky-Watcher Explorer 130 EQ2 telescope is one of the best beginner telescopes simply because it’s one of the most unusual. At its core it’s a Newtonian reflector telescope like many others ...

Newtonian telescopes use a reflecting mirror to avoid the colour distortion and rainbow effect afflicting telescopes that use lenses. Finally, Newton discovered and defined calculus, the ...