The James Webb Space Telescope's 21.3-foot (6.5 meter) diameter primary mirror. (Image credit: NASA/C. Gunn) Aside from its hexagonal shape and enormous size, Webb's most distinctive feature is ...

When it comes to telescopes, there are no bigger names than Hubble and Webb, but why have two space telescopes anyway, how ...

The James Webb Space Telescope is now, finally, a fully deployed telescope.On January 8, 2022, NASA made history by successfully unfolding the telescope’s primary mirror — the largest of its ...

NASA reports that the 18th and final primary mirror segment is installed on what will be the biggest and most powerful space telescope ever launched. The final mirror installation at NASA’s Goddard ...

NASA's massive James Webb Space Telescope has notched another milestone with all 18 primary mirror segments and the secondary mirror fully deployed.

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.

On May 20, 1990, the Hubble Space Telescope sent its first image to Earth. This photo turned out to be 50% sharper than ...

The James Webb Space Telescope successfully completed the unfolding of its giant gold mirror on Saturday. This rounds out some of the greatest challenges and deployments for Webb since it launched ...

The James Webb Space Telescope will be the most powerful space telescope ever built, and it will succeed NASA’s Hubble Space Telescope by 2018. Powering this massive observation machine is a huge ...

The primary mirror segments are still cooling, ... The James Webb Space Telescope is NASA's most precise and technically proficient equipment for observing the wonders of the universe.

Researchers identified the likely planetary candidate’s infrared light after blocking out its host star’s overwhelming glare ...