Spacewatch: Nasa’s Webb telescope mirror alignment continues

Seven-step process to enable segments to work as a single mirror nears halfway point

Nasa has completed three of the seven stages to bring the 18 hexagonal segments of the James Webb space telescope's primary mirror into alignment.

On 25 February, Nasa announced that the mirror segments were in place and their individual images stacking together. This means the separate images produced by the segments have been united to form a single image.