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termsofsurrender t1_iu4sz3h wrote on October 28, 2022 at 3:34 PM

Reply to comment by alvinofdiaspar in Chinese researchers create the world's largest silicon carbide aspherical mirror by tommos

You're right. JWST is an amazing achievement. Herschel's mirror was comprised of smaller mirrors, while the PhysOrg article says that the Chinese made a record-breaking 3m blank.