Thirty Meter Telescope - - Grinding a TMT mirror segment prototype -- This photo shows Brian Dupraw grinding a 1.1 meter Zerodur mirror segment prototype for the Thirty Meter Telescope. TMT primary
![Grind and Polish a Dobsonian/Newtonian Telescope Mirror With Hand Tools : 8 Steps (with Pictures) - Instructables Grind and Polish a Dobsonian/Newtonian Telescope Mirror With Hand Tools : 8 Steps (with Pictures) - Instructables](https://content.instructables.com/F0U/E6C4/KGM9LZVG/F0UE6C4KGM9LZVG.jpg?auto=webp&fit=bounds&frame=1&height=1024&width=1024auto=webp&frame=1&height=150)
Grind and Polish a Dobsonian/Newtonian Telescope Mirror With Hand Tools : 8 Steps (with Pictures) - Instructables
![60-inch telescope mirror on grinding machine, tipped forward. - Photographs - Huntington Digital Library 60-inch telescope mirror on grinding machine, tipped forward. - Photographs - Huntington Digital Library](https://hdl.huntington.org/digital/api/singleitem/image/p15150coll2/524/default.jpg)
60-inch telescope mirror on grinding machine, tipped forward. - Photographs - Huntington Digital Library
![amateur observing - How is it ensured that a parabolic shape forms while polishing a telescope mirror? - Astronomy Stack Exchange amateur observing - How is it ensured that a parabolic shape forms while polishing a telescope mirror? - Astronomy Stack Exchange](https://i.stack.imgur.com/JAzZK.gif)