Share the QR code < / P > < p > with wechat scanning code to friends and circles of friends < / P > < p > < / P > < p > on February 12, NASA announced the first images taken by James Webb Space Telescope (JWST) on Friday local time. Until JWST reaches its full potential, these images represent the ability of the 18 main mirror parts of the telescope to calibrate in the early stages < p > although the image is slightly blurred, this is because NASA is still debugging JWST, and the final shooting effect will get better and better over time. The 18 light spots in the image represent the same star called HD 84406, seen by different primary mirrors. The light collected from each primary mirror is reflected back to the secondary mirror of JWST, and then measured using the near infrared camera (NIRCam), the key imaging device of the telescope. The sensor will be used during the calibration of the telescope to determine and correct any optical errors < p > HD 84406 is a sun like star, about 260 light-years away from the earth. HD 84406 is located in the constellation Ursa Major, but it cannot be seen from earth without a telescope. But for JWST at this stage, this is a perfect early observation target, because its brightness is stable, and the telescope can always find it. However, after the commissioning period, JWST will not be able to observe HD 84406. Once the primary mirror completes focusing, the star will become too bright to observe. Previously, JWST staff had said that by late April, the telescope would see a fairly clear image < p > Figure 1: these 18 light spots are the same star captured by the 18 main mirror parts of JWST < / P > < p > according to NASA, the process of collecting the light used to generate the image took about 25 hours, and the 18 HD 84406 images are spliced from more than 1500 images. Marcia Rieke, an astronomer at the University of Arizona and principal researcher of JWST's mirror alignment process instrument, said in a NASA statement: "the whole team was ecstatic that the first step of JWST's image taking and telescope alignment went so smoothly." < p > in the next few months, through various adjustments to JWST, the mirror will begin to align correctly, which is expected to last for 6 months. In addition, scientists will focus on waking up and calibrating various instruments on the telescope, and fine-tuning the 18 main mirror parts of the telescope. Eventually, the 18 primary mirrors will become a whole, because all lens parts will be aligned to form a seamless mirror < p > Figure 2: each image of the strange star is marked in the order it was captured < / P > < p > after several delays, JWST finally launched on Christmas, ending decades of waiting. But the process didn't stop there. Just a few days later, the telescope began to deform into its final state through a complex two-week deployment sequence. On January 4, JWST successfully deployed a huge sunscreen, which is very important to keep the instrument cold. With the successful deployment of the main mirror on January 8, all major deployments have been completed. On January 24, JWST reached its final docking orbit in space < p > NASA expects the first set of clear images for scientific observation to be sent back this summer. But for now, the JWST team is excited about the positive results of the first imaging and alignment steps of the telescope, which brings it one step closer to taking space images. "It's certainly exciting to send JWST into space, but for scientists and optical engineers, this is only the first peak moment, and light from stars is successfully entering the detector through the system," said Michael McElwain, a JWST project scientist (small) < / P > < p >