On November 5, NASA confirmed on Thursday that due to the bad weather expected in the next few days, SpaceX's third commercial astronaut launch mission crew-3 for the agency will be postponed again < p > NASA and SpaceX have decided to postpone the launch time of crew-3 mission from November 6 US Eastern time (November 7 Beijing time) to November 8 (Beijing time on the 9th), the mission will send four astronauts to the international space station. < / P > < p > meanwhile, NASA and SpaceX are also considering whether to bring the four astronauts on the second commercial astronaut launch mission crew-2 back to earth first, and then send the crew of crew-3 into space. < / P > < p > SpaceX's manned dragon spacecraft and Falcon 9 rocket were originally scheduled to be launched at 1:00 Eastern time On October 31, NASA took off from Launch Pad 39A of NASA Kennedy Space Center. However, before the crew boarded the plane, NASA announced that it would postpone the launch for 72 hours because of the bad weather conditions during the rocket flight. < / P > < p > subsequently, a crew member of crew-3 had a sudden health problem, forcing NASA to postpone the launch until 11:36 p.m. on November 6. However, according to the United States in Cape Canaveral NASA and SpaceX are reconsidering their crew-3 launch and crew-2 return plans. NASA officials said: "Due to the adverse weather conditions for both launch and recovery operations, the mission team is currently considering whether to return crew-2 from the international space station before launching crew-3." < / P > < p > at present, the crew of crew-2 is stationed on the international space station, and the four astronauts include Shane kimbough and Megan McArthur from NASA According to the original plan, if NASA astronauts Raja Chari, Tom marshburn and Kayla Barron of crew-3 And European Space Agency astronaut Matthias Maurer The crew of crew-2 will return to earth on October 31. < / P > < p > initially, the crew-3 launch was postponed to November 3, and the earliest return time of crew-2 was set on November 7. However, weather is one of the most important factors to determine when to take off or return for each mission. < / P > < p > the crew-2 launched in April is a little tight at present, because its manned dragon spacecraft is expected to be too late The air stay is about 210 days, or 7 months. As the deadline approaches and the weather still looks bad, NASA may decide to bring the crew-2 back to earth first. < / P > < p > Steve stich, NASA commercial astronaut program manager, said in his blog: "These are dynamic and complex decisions that change every day. The weather in November can be particularly challenging, so our goal is to advance the plan with the highest mission support and safety probability." < / P > < p > now, the earliest time for crew-2 to return is November 7, and the earliest possible time for crew-3 launch is November 8. NASA said that the agency will continue to monitor the weather conditions to determine the best action time in the next few days. NASA officials said that the health problems of crew-3 sick astronauts are expected to be solved before launch. (small) < / P > < p >