Here's Exactly how Engineers Are Aligning JWST's Segmented Mirrors

Engineers for the James Webb Space Telescope are in the midst of an intricate, three-month-long process of aligning the telescope's 18 separate mirror segments to work together as one giant, high-precision 6.5-meter (21.3-foot) primary telescope mirror. This process, called phasing, began in early February and includes seven different steps, which goes from taking the mirrors' …