中文翻譯:
在遼闊的太空中，想像一下自由飛翔的感覺。布魯斯·麥肯德勒斯二世（Bruce McCandless II）曾經體驗過這種夢想般的時刻！在1984年的太空任務41-B中，他帶著名為Manned Maneuvering Unit（MMU）的裝置，自由地漂浮在太空中，距離太空梭的貨艙大約100米。布魯斯和他的同伴羅伯特·斯圖爾特（Robert Stewart）是第一批嘗試這種不繫帶太空行走的宇航員。MMU可以透過噴射氮氣來控制方向，幫助部署和回收衛星。雖然MMU的重量超過140公斤，但在太空中它是漂浮無重的！後來，MMU被名為SAFER的背部推進裝置取代，讓太空探險變得更加安全和簡便！
原文:
What would it be like to fly free in space? About 100 meters from the cargo bay of a space shuttle, 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.
來源:NASA每日圖片
