宇航员布鲁斯·麦坎德利斯完成了第一次不受束缚的太空行走

Astronaut Bruce McCandless II approaches his maximum distance from the Earth-orbiting Space Shuttle Challenger in this 70mm photo from Feb. 7, 1984. While testing out the nitrogen-propelled, hand-controlled back-pack device called the manned maneuvering unit (MMU) for the first time, McCandless’s fellow crewmembers aboard the reusable vehicle photographed him. The MMU allowed crews to move outside of the cargo bay and perform activities away from the safety of the spacecraft. “It may have been one small step for Neil,” he proclaimed, “but it’s a heck of a big leap for me.”

Learn how this and other iconic photos from the STS-41B mission came to be.

Image Credit: NASA

在这张1984年2月7日拍摄的70毫米照片中，宇航员布鲁斯·麦克坎德雷斯二世正在接近他与绕地球飞行的挑战者号航天飞机的最大距离。在首次测试名为载人机动装置（MMU）的氮气推进手控背包装置时，麦坎德利斯在可重复使用飞行器上的同事给他拍了照。MMU允许机组人员离开货舱，在远离飞船安全的地方进行活动。“对尼尔来说这可能只是一小步，”他宣称，“但对我来说却是一大步。”

了解这张照片和STS-41B任务中的其他标志性照片是如何产生的。

图片来源: NASA