NASA is working to develop the next generation of space-based telescopes to replace Hubble and give astronomers and scientists around the world a better understanding of the universe. One of the future space telescopes is called Nancy grace Roman, or & quot; Roman space telescope for short;. NASA recently announced that the primary mirror of the space telescope, which will collect and focus light, has been completed. < p > < p > Roman will use a 7.9-foot diameter lens to capture images of space, with a field of view 100 times that of the industry model Hubble. Scott Smith, manager of NASA’s Roman telescope, said the completion of the primary mirror was an exciting milestone. Once placed in orbit, the Roman space telescope will be able to travel through dust, across vast spaces, and use infrared light to study the universe. < / P > < p > the primary mirror is crucial for any telescope, and the level of detail astronomers can see in the universe is directly related to the lens. The larger the mirror, the more light the telescope can collect, allowing it to more finely distinguish features seen in the universe. Roman and Hubble use lenses of the same size, but weigh only a quarter: 410 pounds. Compared with the Hubble lens, the significant weight reduction is due to decades of technological improvements. The telescope will have two scientific instruments, including the planetarium and the corona. The planetarium is a 300 million pixel camera that can provide the same resolution as Hubble with nearly 100 times the field of view. The corona is designed to allow telescopes to see planets that are nearly a billion times dimmer than their host stars, enabling detailed studies of extrasolar planets and other solar systems. Didi Qingju bicycle has entered 150 cities