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James Webb telescope sharpness check

James Webb telescope sharpness check

Before the telescope begins science operations and researchers begin observing the universe, the commissioning team had to ensure that each instrument was capable of delivering images that were completely sharp and in focus. To do so, they pointed the James Webb at part of the Large Magellanic Cloud, a dwarf galaxy 163,000 light-years away that contains a field of hundreds of thousands of stars.

The James Webb sensors, pointing at a slightly different part of the sky, resulted in the set of images seen above, which represent the relative arrangement of each of the instruments in the telescope’s focal plane. Each of the captures is labeled with the name of the three optical instruments (NIRCam, NIRISS and MIRI) and the telescope’s single spectrograph (NIRSpec).

James Webb telescope deployed

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