That secondary mirror, in turn, bounced the light (and thus the image seen) into a convex eyepiece lens built into the side of the tube. This was the first working reflecting telescope.

Giant ground-based reflector telescopes do much of astronomy's heavy lifting, although the U.S.'s largest in Hawaii is not ...

This opened the way for the great reflecting telescopes of ... inverse distortions in a deformable mirror. The European ELT is an adaptive telescope with built-in deformable mirrors.

Publications of the Astronomical Society of the Pacific Vol. 119, No. 854, April 2007 The Large Zenith Telescope: A 6 m Liquid... The Large Zenith Telescope: A 6 m Liquid‐Mirror Telescope This is the ...

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

[Hank Green] posted an interesting video about the first liquid mirror telescope from back in the 1850s. At the time, scientists were not impressed. But, these days, people are revisiting the idea.

[Hank Green] posted an interesting video about the first liquid mirror telescope from back in the 1850s. At the time, scientists were not impressed. But, these days, people are revisiting the idea.

Telescope mirrors are sensitive and prone to damage ... you can expect a flawless reflection. And if you happen to have some left over, it can be used to help make your own windshield wiper ...

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 ...