Steve May 3, 2022

NASA’s James Webb Space Telescope Completely Aligned, Fully Focused (

Posted by BeauHD from the achievement-unlocked dept.

Scientists working on NASA’s James Webb Telescope have reached an important milestone, completely aligning the space observatory’s massive mirrors. New Atlas reports: The achievement means the team can now move ahead with configuring the onboard instruments and prepare them to begin capturing sharp and in-focus images of the cosmos. Back in January, the James Webb Space Telescope (JWST) finished deploying its set of 18 mirrors, which it will use to direct light from cosmic objects onto its instruments to capture images. But to do so, the mirrors had to be precisely aligned over a three-month period in order to focus that light correctly. In March, the mirrors were brought into alignment with the telescope’s primary imaging instrument, the Near-Infrared Camera, enabling it to focus and snap a crystal-clear image of a bright star. The team then continued aligning the mirrors with the JWST’s remaining instruments, the Near-Infrared Spectrograph, Mid-Infrared Instrument, and Near Infrared Imager and Slitless Spectrograph — a task that is now complete.

The team confirmed the mirrors were aligned and directing light onto the JWST’s four instruments by capturing a set of test images covering the telescope’s full-field of view […]. The scientists say the optical performance of the telescope continues to exceed even their most optimistic expectations. With the mirrors now in position (save for some slight periodic adjustments here and there), the scientists are now turning their attention to commissioning of the science instruments. The unique lenses, masks, filters and other gear that make these highly sophisticated instruments tick will need to be precisely configured over the next two months, to ready the telescope for the start of its science operations in the middle of the year.

Never let someone who says it cannot be done interrupt the person who is doing it.


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