Share with friends and circle of friends with wechat scan QR code < / P > < p > < p > surging journalist Zhang Jing < / P > < p > < a target = "_ blank" href=" https://news.163.com/news/search?keyword=NASA "> NASA < / a > recently announced that < a target ="_ blank" href=" https://news.163.com/news/search?keyword=%E6%B3%A2%E9%9F%B3 "> Boeing < / a >" interstellar < a target = "_ blank" href=" https://news.163.com/news/search?keyword=%E5%AE%A2%E6%9C%BA "> passenger plane < / a >" the second unmanned test flight is scheduled to start at 14:53 US Eastern time on July 30. During the mission, the vision based navigation system will be tested, which will automatically dock with the international space station, and deliver about 200 kg of cargo and < a target = "_ blank" href=" https://news.163.com/news/search?keyword=%E5%AE%87%E8%88%AA%E5%91%98 "> astronaut < / a > supplies, is expected to stay in orbit for 5-10 days. If the mission achieves all the necessary goals, opportunities will be sought for the first manned flight to send NASA astronauts to the international space station by the end of this year NASA and Boeing are preparing for the second unmanned test flight of the starplane to prove that the system can enable astronauts to safely travel to and from the international space station, NASA said in a statement < p > in the production plant of "starplane" at Kennedy Space Center in Florida, staff recently began to refuel the crew cabin and service cabin and make final inspection. The refueling operation is expected to be completed this week, and then the "starplane" will be transported to the Cape Canaveral space army base to dock with the "Cosmos 5" carrier rocket < p > in the next few weeks, the mission control team will continue to perform simulated mission rehearsals for the second unmanned test flight and the subsequent manned flight< a target="_ blank" href=" https://news.163.com/news/search?keyword=%E7%9D%80%E9%99%86 "> landing < / a > and recovery teams will conduct on-site inspection of one of the landing areas < p > during the second unmanned flight test mission, the starplane will test the vision based navigation system to automatically dock with the international space station and deliver about 200 kg of cargo and astronaut supplies to the station“ The "starplane" is expected to stay in orbit for 5-10 days, then leave the space station and return to earth, landing in the western United States < p > "starplane" is part of NASA's commercial manned program. In 2014, Boeing and SpaceX won US $4.2 billion and US $2.6 billion contracts from NASA respectively for the construction of "starplane" manned spacecraft and manned dragon spacecraft However, compared with SpaceX, which has made great progress and successfully transported three groups of astronauts to the international space station so far, the technical stability boasted by the old Boeing company is not completely reliable, and Boeing's "interstellar airliner" has suffered a lot