The JWST at 6.5m is larger than the largest terrestrial telescope in my childhood. Keck was the first one bigger - 1989. The next one Keck 2 was 1997. https:

The JWST at 6.5m is larger than the largest terrestrial telescope in my childhood. Keck was the first one bigger - 1989. The next one Keck 2 was 1997. https://en.wikipedia.org/wiki/List_of_largest_optical_reflecting_telescopes https://en.wikipedia.org/wiki/List_of_largest_optical_reflec...