According to foreign media reports, in the past two months, NASA (NASA) has been considering the new heavy-duty launch vehicle "space launch system" (SLS) in the first flight in the manned mission, carrying a space Flying into space. Specifically, NASA wondered whether it would be possible to safely complete the manned mission by 2019. However, after assessing the cost and challenge of the SLS rocket mission EM-1, NASA said it was not the best way.
NASA Acting Director Robert & Middot; Robert Lightfoot said: "After assessing the cost, risk and technical factors of the project, it was found that it was difficult to adapt to the changes required for the current manned EM-1 mission. & Rdquo;
This seems to mean that NASA will adhere to the initial strategy on the SLS rocket: first a non-manned space mission, and then perform a manned mission. NASA initially said that in November 2018 the SLS rocket will carry the "lion" and the spacecraft for the first test flight. The mission plan still exists, but technical challenges and limited budgets force NASA to postpone the launch date to 2019. The exact date will be decided in the next few months. The first manned launch will take place in 2021, but this may also be postponed.
According to Space News, at the beginning of this year, Lightfoot issued a memo to employees to study the feasibility of starting the manned mission in SLS, NASA began to consider changing the mission plan. NASA later admitted that the Trump government asked the agency to study whether there was such a possibility.
Lightfoot said at a news conference on Friday that it was technically feasible to start a manned mission in SLS. However, they must accelerate the development of technology, such as life support systems that ensure astronauts life safety. In addition, it will cost more, at least between $ 600 million and $ 900 million. Lightfoot said that by 2020 this goal is more likely to achieve.