MMU meaning in Space Science ?

Answer: What is Manned Maneuvering Unit mean?

The Manned Maneuvering Unit (MMU) is an astronaut propulsion unit that was used by NASA on three Space Shuttle missions in 1984. The MMU allowed the astronauts to perform untethered extravehicular spacewalks at a distance from the shuttle. The MMU was used in practice to retrieve a pair of faulty communications satellites, Westar VI and Palapa B2. Following the third mission the unit was retired from use. A smaller successor, the Simplified Aid For EVA Rescue (SAFER), was first flown in 1994, and is intended for emergency use only.

reference

Full Form	Category
Manchester Metropolitan University	Academic & Science
Myanmar Maritime University	Academic & Science
Morristown (nj)	Airport Code
Mechanical Mechanism Utility	Business
Multi-Media University	Business
Matrix Management Unit	Business
Malfunction Management Units	Business
Million Monetary Units	Business
Managed Municipals Portfolio, Inc.	Business
Mount Mansfield Union	Community
Micro Monde Union	Community
Multi Media Unit	Computing
Mesh Multiring Upgrade	Computing
Mechanized Mining Unit	General
Motherboard Memory Unit	General
Mini Mart Unit	General
Milli Merck Unit	General
Multi Material Upgrade	General
Minimum Mapping Units	General
Malfunction Monitor Unit	General
Mobile Medical Unit	General
Mega Man Universe	General
Cal Fire's Madera-Mariposa-Merced Unit	Governmental
Morristown Municipal Airport	Governmental
MUGMA	Indian Railway Station
Memory Management Unit	Information Technology
Minimum Mapping Unit	Military and Defence
Medium Machine Gun Upgrade	Military and Defence
Morristown, New Jersey	Regional
Manned Maneuvering Unit	Space Science
Mass Memory Unit	Space Science
Malfunction Management Unit	Space Science