The technological marvel that is the James Webb Space Telescope (JWST ... To do this, it's been given a 6.5m-wide, golden mirror that engineers are now checking one last time.

Telescope mirrors require some kind of metal coating to reflect as much light as possible. JWST uses gold mirrors to catch UV and visible light emitted by early luminous objects. Secondly ...

and the power of a telescope scales with the square of the diameter of the mirror. And that's where JWST comes in." It was the 18th-Century astronomer William Herschel who discovered the infrared.

The James Webb Space Telescope was launched on Christmas Day, 2021. In January, it arrived at what is planned to be its permanent, high-orbit location about 930,000 miles from Earth. Quickly, it ...