3 ms·
>"that final polishing process ... takes about 18 months" That's a lot faster than it used to be. The 200 inch mirror at Mt Palomar took 13 years to grind and
by woodandsteel 9y ago
>"that final polishing process ... takes about 18 months"
That's a lot faster than it used to be. The 200 inch mirror at Mt Palomar took 13 years to grind and polish. I guess they have greatly improved the technology.
https://en.wikipedia.org/wiki/Hale_Telescope https://en.wikipedia.org/wiki/Hale_Telescope