SpaceX Dragon太空舱于4月7日返回地球

A SpaceX Dragon capsule returned to Earth April 7, marking the end of the final mission of the original cargo version of the spacecraft.

SpaceX Dragon太空舱于4月7日返回地球，标志着该飞船最后一次货运任务的结束。

The Dragon spacecraft, unberthed from the station’s Harmony module earlier in the day by the station’s Canadarm2 robotic arm, was released by the arm at 9:06 a.m. Eastern. The spacecraft maneuvered away from the station and later performed a re-entry burn, splashing down in the Pacific Ocean about 500 kilometers southwest of Long Beach, California, at 2:50 p.m. Eastern.

当天早些时候，“龙”号宇宙飞船被空间站的Canadarm2机械臂从空间站的“和谐”舱中卸下，并于东部时间上午9点06分由该机械臂释放。当天下午2点50分，这艘宇宙飞船离开了空间站，随后进行了再入大气层时的燃烧，溅落在加州长滩西南约500公里处的太平洋上。

The departure and return of the Dragon took place normally despite the ongoing coronavirus pandemic. NASA noted in its coverage of the Dragon’s departure that personnel at Mission Control at the Johnson Space Center are alternating shifts between two control rooms, so that while one is in use the other is cleaned. Some controllers at SpaceX’s own mission control center at its Hawthorne, California, headquarters were seen in NASA TV coverage wearing face masks.

尽管正在发生冠状病毒大流行，但龙的离开和返回仍是正常的。美国国家航空航天局(NASA)在对“龙”号离开的报道中指出，约翰逊航天中心任务控制部的工作人员在两个控制室之间轮换，以便在使用一个控制室时对另一个进行清洁。在NASA电视报道中，人们看到SpaceX公司位于加州霍桑的任务控制中心的一些控制员戴着口罩。

The Dragon launched to the station on the CRS-20 cargo mission March 6, arriving at the station early March 9. The spacecraft transported to the station 1,977 kilograms of cargo. It returned with more than 1,800 kilograms of cargo, including the results of experiments conducted on the station.

“龙”号于3月6日通过CRS-20货运任务发射到空间站，于3月9日凌晨抵达空间站。宇宙飞船向空间站运送了1977公斤的货物。它带着1800多公斤的货物返回，包括在空间站进行的实验结果。

The mission is the last under SpaceX’s original Commercial Resupply Services (CRS) contract, which NASA awarded in 2008. The contract originally included 12 flights for $1.6 billion. NASA later added eight missions to the contract. The agency has not disclosed the total value of the extended contract, but a 2018 report by NASA’s Office of Inspector General stated SpaceX was due to receive $3.04 billion for those 20 missions, near the maximum allowed value of $3.1 billion for the CRS contract.

这是SpaceX公司2008年签署的原商业再补给服务(CRS)合同的最后一项任务。该合同最初包括12次飞行，价值16亿美元。NASA后来在合同中增加了8项任务。该机构没有透露延长合同的总价值，但NASA监察长办公室2018年的一份报告称，SpaceX将从这20次任务中获得30.4亿美元，接近CRS合同允许的31亿美元的最高价值。

Future SpaceX cargo missions will use a version of the Crew Dragon spacecraft the company developed for NASA’s commercial crew program. That vehicle will have 20% more volume than the original cargo Dragon but lack the SuperDraco thrusters used in the Crew Dragon’s abort system. The spacecraft will also be able to dock directly with the station, rather than be berthed by the station’s robotic arm, and splash down in the Atlantic Ocean rather than the Pacific.

未来的SpaceX货运任务将使用该公司为NASA商业载人计划开发的Crew Dragon航天器的一个版本。该运载工具将有20%以上的体积比原来的货运龙，但缺乏SuperDraco推进器用于船员龙的中止系统。航天器还将能够直接与空间站对接，而不是由空间站的机械臂停泊，并溅落在大西洋而不是太平洋。