The JWST also has a secondary mirror 0.74 metres across, plus a smaller tertiary mirror to remove the scope’s astigmatism and flatten the focal plane ready for its scientific instruments. Together, ...

After a series of important steps for the James Webb Space Telescope that have gone really well, there’s even more great JWST news: The 18 small mirrors have gone through their initial alignment ...

In the coming days, the JWST team will tweak the arrangement of the 18 individual mirror segments, each of which is controlled by seven actuators, according to a deployment timeline provided by NASA.

But sometime between May 23 and 25, 2022, the James Webb Space Telescope was hit by a micrometeoroid, ... The James Webb Space Telescope’s primary mirror is composed of 18 smaller (1.3 meter) ...

The latest update from the James Webb Space Telescope is a new image of the star HD 84406 shown 18 times in a hexagonal image array. Skip to main content Menu ...

The JWST mirror system includes 18 gold-coated, ultrasmooth, 4.2-foot (1.3 meters) hexagonal mirror segments that comprise the 21.3-foot (6.5 m) primary mirror.

SAN FRANCISCO — An initial set of images taken by NASA’s James Webb Space Telescope shows that the spacecraft’s primary mirror is performing as expected during its months-long alignment process.

The James Webb Telescope has finally unfurled its rightmost primary mirror wing, completing the deployment process. It will now travel for about two more weeks to its final destination in deep space.

In the clean room at NASA's Goddard Space Flight Center in Greenbelt Maryland, a team of engineers has unveiled the vast gold-covered primary mirror of the future James Webb Space Telescope (JWST).

JWST has been able to discover galaxies with redshifts of 9 to 14, representing some of the most distant galaxies ever found, floating very far away in the infant cosmos. Redshift measurement methods ...

The covers come off the huge mirror that the James Webb Space Telescope - the planned successor to Hubble - will use to detect the light from the first stars to shine in the Universe.

With James Webb's MIRI instrument now cooled to its operating temperature, the telescope is approaching its final temperature as it mirrors cool as well. Skip to main content Menu ...