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Astronaut Bruce McCandless on First-ever Untethered Spacewalk

Astronaut performs untethered spacewalk
Astronaut Bruce McCandless II, mission specialist, participates in a spacewalk a few meters away from the cabin of the space shuttle Challenger on Feb. 7, 1984. He is using a nitrogen-propelled hand-controlled manned maneuvering unit (MMU).

Astronaut Bruce McCandless II, mission specialist, participates in a spacewalk a few meters away from the cabin of the space shuttle Challenger on Feb. 7, 1984. He is using a nitrogen-propelled hand-controlled manned maneuvering unit (MMU). He is performing this spacewalk without being tethered to the shuttle. Below him can be seen a cloudy view of the earth as McCandless approaches his maximum distance from the Challenger.

Image Credit: NASA