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美国发现号航天飞机于1992年1月22日美国东部标准时间上午9时52分,携带国际微重力实验室(IML)从肯尼迪空间中心发射升空。飞行任务代号为STS-42。这是美国航天飞机第45次飞行及发现号航天飞机第13次飞行。因天气原因及一些仪表的错误显示,发射推迟了1小时。这次飞行是自1986年挑战者号航天飞机失事后的第一次国际航天飞机飞行。参加飞行的7名机组人员是:指令长罗纳德J.格雷比空军上校(46岁)、驾驶员斯蒂芬S.奥斯瓦尔德(40岁)、有效载荷指令长诺曼.萨加特博士(48岁)、飞行任务专家戴维.C希尔墨斯海军陆战队中校(41岁)、威廉F.
The U.S. space shuttle Discovery took off at Kennedy Space Center with the International Microgravity Laboratory (IML) on January 22, 1992, at 9:52 a.m. EST. Mission code-named STS-42. This is the 45th flight of the U.S. space shuttle and the 13th space shuttle of the Discovery. Due to the weather and some meter errors, the launch was postponed for 1 hour. This flight is the first International Space Shuttle flight since the 1986 Challenger space shuttle crash. The seven crew members who participated in the flight were Command Commander Colonel Ronald J. Graybike (46), driver Stephen S. Oswald (40), Dr. Norman Sagart, Payload Instruction (48), mission officer David C. Cilmes Marine Corps (41), William F.