NASA’s Webb Space Telescope Receives First Mirror Installation

  • Released Thursday, December 3, 2015

NASA has successfully installed the first of 18 flight mirrors onto the James Webb Space Telescope, beginning a critical piece of the observatory’s construction.

In the clean room at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, the engineering team used a robot arm to lift and lower the hexagonal-shaped segment that measures just over 4.2 feet (1.3 meters) across and weighs approximately 88 pounds (40 kilograms). After being pieced together, the 18 primary mirror segments will work together as one large 21.3-foot (6.5-meter) mirror. The full installation is expected to be complete early next year.

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NASA's Goddard Space Flight Center

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This page was originally published on Thursday, December 3, 2015.
This page was last updated on Wednesday, May 3, 2023 at 1:49 PM EDT.


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