On February 10, NASA expressed concern about the plan of Elon Musk's SpaceX to deploy about 30000 satellites for the star chain project, and many large companies were also deeply disturbed < p > SpaceX was previously authorized to deploy about 12000 satellites and provide broadband Internet services, and requested to deploy a second-generation satellite chain network including 30000 satellites < p > NASA wrote in a letter to the Federal Communications Commission (FCC): "NASA is concerned that the frequency of related events caused by the deployment of SpaceX satellites may increase significantly and may have an impact on NASA's scientific and manned space missions." < p > NASA pointed out that the agency currently tracks 25000 orbital objects, of which about 6100 objects are located in a range of about 600 kilometers from the ground. SpaceX's Gen2 expansion project plans to "more than double the number of tracked objects in orbit and fivefold the number of objects below 600 kilometers" < p > Jonathan McDowell, a scientist at the Harvard Smithsonian Center for Astrophysics, is a member of the team of the American Astronomical Society to study the impact of satellites on astronomy, "We are always worried that too many satellites will interfere with astronomical observations. I think we need more experience in how to manage thousands of satellites in operation before launching tens of thousands of satellites," he said < p > SpaceX did not immediately respond to a request for comment. Musk tweeted on January 15 that 1469 satellites in SpaceX are currently active, and another 272 satellites will soon enter orbit < p > Amazon also launched the "project Kuiper", which plans to spend at least US $10 billion to build 3236 microsatellites. Like dish network, the company separately raised concerns about the SpaceX program to the FCC < p > Amazon said that according to SpaceX's plan, "at least hundreds or even more than 10000 SpaceX satellites will operate at the same altitude as the Kuiper system. This orbital overlap will greatly increase the risks and other burdens faced by the Kuiper system, and the FCC should put forward reasonable restrictions." < p > although the deployment cost is very high, satellite technology can provide high-speed Internet services for people living in rural areas or remote areas inaccessible to optical cables and cellular towers. This technology may also provide critical support when communications are disrupted by hurricanes or other natural disasters. (small) < / P > < p >