MMU
E673855
Manned Maneuvering Unit
NASA spaceflight hardware
extravehicular activity equipment
propulsive backpack
MMU is a NASA-developed, self-contained jetpack-like device that allowed astronauts to move freely in space without being tethered to the spacecraft.
All labels observed (1)
| Label | Occurrences |
|---|---|
| MMU canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T7574409 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: MMU Context triple: [Manned Maneuvering Unit, abbreviation, MMU]
-
A.
MMU
MMU is a large public university in Manchester, England, known for its diverse academic programs and strong links with industry and the creative sectors.
-
B.
I/O Memory Management Unit
An I/O Memory Management Unit (IOMMU) is a hardware component that maps device-visible virtual addresses to physical memory addresses, enabling secure and efficient direct memory access (DMA) and device isolation.
-
C.
MMC
MMC is the stock ticker symbol for Marsh & McLennan Companies, a global professional services firm specializing in risk, strategy, and insurance.
-
D.
MMC
MMC is the commonly used abbreviation for the Modesto A. Maidique Campus of Florida International University in Miami, Florida.
-
E.
Monolithic Memories
Monolithic Memories was a semiconductor company known for developing programmable read-only memory (PROM) and logic devices after being spun off from Fairchild Semiconductor.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: MMU Target entity description: MMU is a NASA-developed, self-contained jetpack-like device that allowed astronauts to move freely in space without being tethered to the spacecraft.
-
A.
MMU
MMU is a large public university in Manchester, England, known for its diverse academic programs and strong links with industry and the creative sectors.
-
B.
I/O Memory Management Unit
An I/O Memory Management Unit (IOMMU) is a hardware component that maps device-visible virtual addresses to physical memory addresses, enabling secure and efficient direct memory access (DMA) and device isolation.
-
C.
MMC
MMC is the stock ticker symbol for Marsh & McLennan Companies, a global professional services firm specializing in risk, strategy, and insurance.
-
D.
MMC
MMC is the commonly used abbreviation for the Modesto A. Maidique Campus of Florida International University in Miami, Florida.
-
E.
Monolithic Memories
Monolithic Memories was a semiconductor company known for developing programmable read-only memory (PROM) and logic devices after being spun off from Fairchild Semiconductor.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
Manned Maneuvering Unit
ⓘ
NASA spaceflight hardware ⓘ extravehicular activity equipment ⓘ propulsive backpack ⓘ |
| abbreviationOf | Manned Maneuvering Unit ⓘ |
| category |
space suit accessories
ⓘ
spacecraft maneuvering systems ⓘ |
| component |
attitude control thrusters
ⓘ
electronics and control system ⓘ translation control thrusters ⓘ twin gas tanks ⓘ |
| controlMode | six-degree-of-freedom maneuvering ⓘ |
| controlSystem | hand controllers on armrests ⓘ |
| countryOfOrigin |
United States
ⓘ
linked to:
United States of America
|
| developer |
NASA
ⓘ
NASA Johnson Space Center ⓘ
linked to:
Johnson Space Center
|
| displayedAt | Smithsonian National Air and Space Museum ⓘ |
| environment | microgravity ⓘ |
| firstAstronautUser | Bruce McCandless II ⓘ |
| firstFlightMission |
STS-41-B
ⓘ
linked to:
STS-41B
|
| firstFlightYear | 1984 ⓘ |
| mass |
approximately 148 kilograms
ⓘ
approximately 326 pounds ⓘ |
| maxRotationRate | about 4 degrees per second ⓘ |
| maxTranslationVelocity | about 25 feet per second ⓘ |
| mountingLocation | astronaut life-support backpack area ⓘ |
| notableEvent | first untethered spacewalk by Bruce McCandless II ⓘ |
| operatedBy |
NASA astronauts
ⓘ
linked to:
NASA Astronaut Corps
|
| operatedFrom | Space Shuttle ⓘ |
| operatedIn | low Earth orbit ⓘ |
| powerSource | battery powered ⓘ |
| propulsionType | compressed nitrogen gas thrusters ⓘ |
| replacedBy |
Simplified Aid For EVA Rescue
ⓘ
linked to:
Manned Maneuvering Unit
|
| retirementReason |
change in Shuttle mission profiles
ⓘ
safety concerns after Challenger accident ⓘ |
| safetyFeature |
built-in emergency propulsion capability
ⓘ
redundant control systems ⓘ restraint and tether attachment points ⓘ |
| status | retired ⓘ |
| thrustCapability | approximately 24 small thrusters ⓘ |
| usedFor |
astronaut self-rescue and retrieval
ⓘ
satellite capture and repair ⓘ untethered extravehicular activity ⓘ |
| usedForMissionTask |
Solar Maximum Mission satellite repair
ⓘ
retrieval of Palapa B2 satellite ⓘ retrieval of Westar VI satellite ⓘ |
| usedOnMission |
STS-41-B
ⓘ
linked to:
STS-41B
STS-41-C ⓘ
linked to:
STS-41C
STS-51-A ⓘ
linked to:
STS-51A
|
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: MMU Description of subject: MMU is a NASA-developed, self-contained jetpack-like device that allowed astronauts to move freely in space without being tethered to the spacecraft.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.