JWST Mirror Aligned ‘As Finely As Laws Of Physics Allow’

March 16, 2022
A red filter was used to optimize contrast in this JWST engineering image of the target star known as 2MASS J17554042+6551277, which was used to validate the telescope’s optical alignment.
Credit: NASA/STSci
CAPE CANAVERAL—The 18 segments of the James Webb Space Telescope (JWST) primary mirror are now fully aligned, working as a single, 21-ft.-dia. mirror, exactly as designed. Following coarse and fine phasing to align the segments, the observatory relayed images of a target star, which when stacked...

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