在太空中自由飞翔
(原标题: To Fly Free in Space)
2023-05-14
浏览次数: 11
在太空中自由飞行会是什么感觉？在距离“挑战者”号航天飞机货舱大约100米的地方，布鲁斯·麦坎德利斯二世正在实现自己的梦想——漂浮在比以往任何人都更远的地方。在载人机动装置（MMU）的引导下，宇航员麦坎德利斯（如图）在太空中自由漂浮。在1984年的41-B号航天飞机任务中，麦坎德利斯和他的同事罗伯特·斯图尔特是第一个体验这种“不受束缚的太空行走”的人。MMU通过喷射氮气来工作，并用于帮助部署和回收卫星。MMU的质量超过140公斤，在地球上很重，但和所有东西一样，在轨道上漂流时是失重的。MMU后来被SAFER背包推进装置取代。
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What would it be like to fly free in space? At about 100 meters from the cargo bay of the space shuttle Challenger, Bruce McCandless II was living the dream -- floating farther out than anyone had ever been before. Guided by a Manned Maneuvering Unit (MMU), astronaut McCandless, pictured, was floating free in space. During Space Shuttle mission 41-B in 1984, McCandless and fellow NASA astronaut Robert Stewart were the first to experience such an "untethered space walk". The MMU worked by shooting jets of nitrogen and was used to help deploy and retrieve satellites. With a mass over 140 kilograms, an MMU is heavy on Earth, but, like everything, is weightless when drifting in orbit. The MMU was later replaced with the SAFER backpack propulsion unit.