On March 17, according to foreign media reports, NASA announced on Wednesday local time that the main mirror of the James Webb Space Telescope (JWs) has been fully aligned, and its performance is even better than the most optimistic expectations < p > < / P > < p > the main mirror is 21.3 feet (6.5 meters) in diameter and consists of 18 hexagonal parts. It must be folded before it can be launched into space. Since the launch on December 25 last year, the mission control team has been trying to align these mirrors to form a smooth reflective surface < p > NASA officials said that the mirror calibration process includes nano-scale fine-tuning of the position and inclination of 18 parts. At present, this process has been completed. Although the final deployment of the telescope has not been completed, it has taken amazing images to scientists < p > Jane Rigby, a Weber operations scientist at NASA's Goddard Space Flight Center, said: "So far, the performance of this telescope has even exceeded our expectations. The engineering images we see today are as clear as those taken by the Hubble Space Telescope, but their wavelengths are invisible to Hubble. Therefore, this quickly makes the invisible universe a very clear focus." < p > NASA also released the latest clear focused image of the target star taken by the Weber telescope. More interesting than the star itself, however, is its background, which shows dozens of spots, each of which is a distant galaxy that was previously inaccessible. These distant galaxies made Weber's first focused image known as the so-called "space deep field". Such photos focus on a small part of the sky in order to capture more distant objects in the universe < p > Rigby said: "looking for 2000 seconds at any point in the sky, Weber can get an incredible deep field. From now on, this is the future. No matter where we look, it will be a deep field. We don't even have to spend any effort to see the stars of the past and the light of billions of years ago." Weber can get the same results in just a few hours, compared with Hubble taking weeks to get deep images < p > NASA said that the design sensitivity of the Weber telescope is 100 times that of the Hubble telescope. This goal has not only been achieved, but also exceeded expectations. Lee Feinberg, component manager of Weber optical telescope at Goddard Space Flight Center, said: "this picture shows that the optical performance of Weber telescope is absolutely amazing, and its performance is even better than our most optimistic expectations." < p > the mission control team will now focus on deploying four scientific instruments on the Weber telescope. The first scientific images are expected to be released in June or July. Until then, NASA will keep this object, which will become the first target of Weber's scientific exploration, confidential. With all the equipment deployed, arranged and cooled, the Weber telescope will be able to see the first stars in the newborn universe only hundreds of millions of years after the big bang. (small) < / P > < p >