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 ...

Webb succeeds the Hubble Space Telescope, which, when it was launched in 1990, had a major defect in its primary mirror. Scientists realised very quickly on receiving the first pictures that the ...

While the James Webb Space Telescope is almost at its deep space temperature, NASA officials wrote in an update, there's no firm timeline on when it will get cool enough.

How does the camera on the James Webb Space Telescope work and see so far out? – Kieran G., age 12, Minnesota Imagine a ...

Moving at a quarter of a mile per second in space, NASA’s long-awaited James Webb Space Telescope got its golden wings Saturday in the final stage of its deployment since launch.

The James Webb Space Telescope hit another milestone this week; NASA announced that the $10 billion observatory's 18 hexagonal mirror segments and its secondary mirror have been fully deployed.

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 ...

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 ...

The James Webb Space Telescope uses a 19.7-foot-tall primary mirror to collect light. That light is bounced to a smaller secondary mirror, which then redirects it onto the telescope’s ...

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

A possible new "jellyfish" galaxy discovered by the James Webb Space Telescope could deepen our understanding of galaxy ...