Space Walks And MMUs In The Early Shuttle Era
Astronauts first did space walks in 1965 and in 1984 gained tetherless freedom with MMUs to maneuver through orbit. These units, costly and short lived, granted satellite retrieval via thruster jets, later replaced by the space shuttle robotic arm.
MENTIONED IN THIS ARTICLE
Space Shuttle
Safer spacewalks aided by new suits and gear
NASA scientists led by Greg Harbaugh describe safer EVA practices on the space station. Modern suits provide oxygen for at least 30 minutes after a hole appears and crews will use tether lines and new jet packs to return to safety, while tools are checked to prevent punctures.
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Space
Greg Harbaugh
NASA
Training Astronauts Learn Space Walking in Giant Water Tank
Astronauts practice moving in weightlessness inside a massive water tank that holds over 6 million gallons and takes a month to fill. Greg Harbaugh says underwater buoyancy mirrors space: a buoyant bubble tends to rise while water slows and stops movement. He notes space movement is continuous unless stopped in training.
MENTIONED IN THIS ARTICLE
Greg Harbaugh
Space
Also Mentioned on This Page
Earth
Heaven
Vincent van Gogh
MMU
Bruce McCandless II