双语太空播报NASA的新一代巨型月球火箭已登上发射台

　　NASA’s Mega Moon Rocket, Spacecraft Complete First Roll to Launch Pad
　　NASA’s Space Launch System (SLS) rocket with the Orion spacecraft atop arrived at Launch Pad 39B at the agency’s Kennedy Space Center in Florida Friday in preparation for a final test before its Artemis I Moon mission.
　　The uncrewed flight test will pave the way for missions to land the first woman and first person of color on the Moon under Artemis, and the rocket rolled to the pad for a final test before launch.
　　＂From this sacred and historical place, humanity will soon embark on a new era of exploration,＂ said NASA administrator Bill Nelson. ＂Artemis I will demonstrate NASA’s commitment and capacity to extend humanity’s presence on the Moon – and beyond.＂
　　Stacked on the mobile launcher and mounted on the crawler-transporter for a journey from the Vehicle Assembly Building to Launch Pad 39B, it took 10-hours and 28 minutes for SLS and Orion to reach the launch pad four miles away. The trip began at 5:47 p.m. Thursday, March 17, and the 322-foot tall, 3.5-million-pound rocket and spacecraft arrived at the pad at 4:15 a.m. on March 18.
　　The upcoming final test, known as the wet dress rehearsal, will run the Artemis I launch team through operations to load propellant into the rocket’s tanks, conduct a full launch countdown, demonstrate the ability to recycle the countdown clock, and also drain the tanks to practice the timelines and procedures the team will use for launch.
　　＂Rolling out of the Vehicle Assembly Building is an iconic moment for this rocket and spacecraft, and this is a key milestone for NASA,＂ said Tom Whitmeyer, deputy associate administrator for Common Exploration Systems Development at NASA Headquarters in Washington. ＂Now at the pad for the first time, we will use the integrated systems to practice the launch countdown and load the rocket with the propellants it needs to send Orion on a lunar journey in preparation for launch.＂
　　Before the test, SLS, Orion, and the associated ground systems will undergo checkouts at the pad. After the rehearsal, NASA will review data from the test before setting a specific target launch date for the upcoming Artemis I launch. The integrated rocket and spacecraft will roll back to the Vehicle Assembly Building several days after the test to remove sensors used during the rehearsal, charge system batteries, stow late-load cargo, and run final checkouts. Orion and SLS will then roll to the launch pad for a final time about a week before launch.
　　With Artemis, NASA will establish long-term exploration at the Moon in preparation for human missions to Mars. SLS and NASA’s Orion spacecraft, along with the human landing system and the Gateway in orbit around the Moon, are NASA’s foundation for deep space exploration.
　　美国宇航局的太空发射系统（SLS）火箭搭载猎户座飞船，周五抵达佛罗里达州肯尼迪航天中心的39B发射台，为阿尔忒弥斯一号登月任务前的最后一次测试做准备。
　　月球在美国宇航局的太空发射系统火箭和猎户座宇宙飞船后面升起。
　　2022年3月17日星期四，在佛罗里达州美国宇航局肯尼迪航天中心，月球被看到在美国宇航局太空发射系统 (SLS) 火箭后面升起，猎户座飞船搭载在移动发射器上，首次向发射综合体 39B推出。在NASA 的 Artemis I飞行测试之前，完全堆叠和集成的 SLS 火箭和猎户座飞船将在发射场 39B 进行湿式彩排，以验证系统并练习首次发射的倒计时程序。
　　无人飞行测试将为在阿尔忒弥斯的带领下将第一位女性和第一位有色人种登陆月球铺平道路，火箭在发射前滚到发射台进行最后测试。
　　＂从这个神圣而历史悠久的地方，人类将很快开始一个新的探索时代，＂美国宇航局局长比尔尼尔森说。 ＂阿尔忒弥斯一世将展示 NASA 的承诺和能力，以扩大人类在月球及其他地区的存在。＂
　　堆叠在移动发射器上并安装在履带运输车上，从车辆装配大楼到发射台39B，SLS和Orion 花了10小时28分钟才到达四英里外的发射台。旅行于下午5点47分开始。3月17日星期四，322英尺高、350万磅重的火箭和航天器于3月18日凌晨4点15分抵达发射台。
　　即将到来的最终测试，被称为湿装彩排，将让 Artemis I 发射团队完成将推进剂装入火箭油箱的操作，进行完整的发射倒计时，展示回收倒计时时钟的能力，并将油箱排干以练习团队将用于发布的时间表和程序。
　　华盛顿 NASA 总部负责通用探索系统开发的副副署长汤姆·惠特迈尔 (Tom Whitmeyer) 表示：＂对于这枚火箭和航天器来说，从飞行器装配大楼推出是一个标志性的时刻，这对 NASA 来说是一个重要的里程碑。＂ ＂现在第一次在发射台上，我们将使用集成系统来练习发射倒计时，并为火箭装载所需的推进剂，以便将猎户座送上月球之旅，为发射做准备。＂
　　测试前，SLS、Orion 和相关的地面系统将在平台进行检查。排练后，NASA 将审查测试数据，然后为即将到来的Artemis I发射设定具体的目标发射日期。集成的火箭和航天器将在测试几天后返回车辆装配大楼，以移除在排练期间使用的传感器、为系统电池充电、存放延迟装载的货物并进行最终检查。猎户座和 SLS 将在发射前大约一周最后一次滚动到发射台。
　　借助Artemis，NASA 将在月球上建立长期探索，为人类前往火星的任务做准备。SLS 和美国宇航局的猎户座飞船，以及人类着陆系统和绕月轨道的网关，是美国宇航局进行深空探索的基础。