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Re:James Webb telescope reaches its final destination in spa... by sgt101 on Tuesday January 25, 2022 @07:55AM (#30071229)
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_reflec...

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