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And grinding and polishing away the 4½ tons of glass in the blank to make it parabolic took 14 years!
by martyvis 4y ago
And grinding and polishing away the 4½ tons of glass in the blank to make it parabolic took 14 years!
- gambiting 4y agoIt says the mirror was installed 4 years after being made, where did you get 14 years from?
- martyvis 4y agoI haven't read this through thoroughly, but a lot of the final polishing must have been done after it was in place. It was only moved from Pasadena to Mount Palomar in 1947. There is both a '47 and '49 as being when figuring was done. https://sites.astro.caltech.edu/palomar/about/history.html https://sites.astro.caltech.edu/palomar/about/history.html