[r_barton]

I remember when the Mt Palomar telescope was the world's largest with its 200-inch (5-meter) mirror. Now there are 409 inch (10.4-meter) telescopes. The Hubble Telescope has a 94-inch (2.4-meter) mirror.

List of largest optical reflecting telescopesr. https://en.wikipedia.org/wiki/List_of_largest_optical_reflecting_telescopes

Comparison optical telescope primary mirrors.svg https://en.wikipedia.org/wiki/File:Comparison_optical_telescope_primary_mirrors.svgr.

[SunkenCiv]

Thanks!