“Going from Hubble to the James Webb Space Telescope is like going ... Like Webb, Spitzer is a cryogenic telescope with a beryllium mirror, but less than one meter in diameter—“a tiny ...

The James Webb Space Telescope is the most complex ... Its 6.5-meter gold-plated beryllium mirror collects faint light from the earliest galaxies, while cryocoolers and vibration-free systems ...

This photo gives a "worms eye" view of a robot arm holding a surrogate or simulated mirror segment (black hexagonal shape) for NASA's James Webb Space ... the telescope's beryllium mirrors ...

James Webb’s segmented mirrors remain vulnerable to micrometeorite damage. Researchers are developing plans for replacing damaged mirrors to avoid wasting costly investments. Repair spacecraft ...