WIKIARCHIVES.SPACE

Astronaut Bruce McCandless II floats a few meters away from the cabin of the earth-orbiting Space Shuttle Challenger as part of an historic Extravehicular Activity (EVA) during Flight 41-B. This is the first use of the nitrogen-propelled, hand-controlled device called the Manned Maneuvering Unit (MMU), which allows astronauts to move freely in space without a tether