A little over four times the diameter of the James Webb Space Telescope. According to the website, the mirrors are cast at the University of Arizona mirror lab and take four years each to make.

The James Webb Telescope's gold mirrors aren’t just for looks—they’re a scientific marvel. Gold reflects up to 99% of ...

NASA's Roman Space Telescope is preparing for launch in 2027, with a mission to study distant galaxies and explore dark ...

The Webb telescope — a scientific collaboration between NASA, ESA, and the Canadian Space Agency — is designed to peer into ...

Telescope mirrors are sensitive and prone to damage ... And if you happen to have some left over, it can be used to help make your own windshield wiper fluid, too. Want the latest in tech and ...

PE was only going to make one mirror and after NASA requested a backup ... Some experiments could use the telescope the way it was, but others were impossible. So for three years, the telescope ...

Making the far near The invention ... This was the first working reflecting telescope. Other designers proved unable to grind mirrors with a regular curvature, so the reflector remained largely ...