NASA had few options to avoid disaster; and yet, they did it. When McCandless climbed into the MMU for the first untethered spacewalk on February 7, 1984, he knew the risks. A single failure could ...

using the Canadarm. Garneau was speaking to Space.com on the 40th anniversary of his first spaceflight, also Canada's first, in 1984. Credit: Space.com | NASA | edited by Steve Spaleta South Korea ...

NASA NASA astronaut Bruce McCandless II stepped away from the Space Shuttle Challenger on Feb. 7, 1984, using a jet-powered backpack called the Manned Manoeuvring Unit (MMU). He was the first ...

Once there, he inserted the stinger into the satellite’s Apogee Kick Motor bell and using the MMU’s attitude control system stopped Palapa’s spin," NASA explains of the first of the two ...