For some cool stuff about mirror development, I recommend reading up on the Hale telescope. https://en.wikipedia.org/wiki/Hale_Telescope https://en.wikipedia.or

For some cool stuff about mirror development, I recommend reading up on the Hale telescope. https://en.wikipedia.org/wiki/Hale_Telescope https://en.wikipedia.org/wiki/Hale_Telescope Some massive improvements to mirror making techniques were derived from the construction.