Engineers at NASA’s Johnson Space Center in Houston used light waves to align the James Webb Space Telescope’s mirror segments to each other, so they act like a single, monolithic mirror in the cryogenic cold of the center’s iconic Chamber A.


The James Webb Space Telescope (JWST) is a space telescope that is part of NASA’s Next Generation Space Telescope program, it will offer unprecedented resolution and sensitivity from the long-wavelength (orange to red) visible light through the mid-infrared (0.6 to 27 micrometer) range and enables a broad range of investigations across the fields of astronomy and cosmology.