Building a better refractor The spyglass-turned-telescope had limitations, some of which Galileo was able to design around ... This was the first working reflecting telescope.

The journey of astronomical telescopes began in the early 17th century when Galileo Galilei crafted his first refracting telescope in 1609. Although not the inventor of the telescope, Galileo was the ...

Dobsonians are based on the reflector telescope design that sees a large primary mirror collect light then reflect it back into a secondary mirror (here's an explainer of the different telescope ...

The teams behind two potential new space telescopes have embarked on their final design studies as they ... the light entering the telescope and reflecting off its 1.8-meter (5.9 feet) aluminum ...