Manned Maneuvering Unit
E179325
The Manned Maneuvering Unit is a NASA-developed, backpack-like propulsion system that allowed astronauts to fly untethered in space during early Space Shuttle missions.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Manned Maneuvering Unit canonical | 4 |
| Simplified Aid for EVA Rescue | 1 |
| test Astronaut Maneuvering Unit | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1583757 — 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: Manned Maneuvering Unit Context triple: [STS-41B, usedEquipment, Manned Maneuvering Unit]
-
A.
Apollo Lunar Module
The Apollo Lunar Module was the two-stage spacecraft used by NASA during the Apollo missions to land astronauts on the Moon and return them to lunar orbit.
-
B.
Mobile Servicing System
The Mobile Servicing System is a Canadian-built robotic system on the International Space Station used for assembly, maintenance, and cargo handling in orbit.
-
C.
Orion spacecraft
The Orion spacecraft is NASA’s next-generation crewed space vehicle designed to carry astronauts beyond low Earth orbit on deep-space missions, including journeys to the Moon and eventually Mars.
-
D.
SLIM lunar lander
The SLIM lunar lander is a Japanese spacecraft designed by JAXA to demonstrate high-precision, lightweight landing technology on the Moon’s surface.
-
E.
ATV spacecraft
The ATV spacecraft was an automated European cargo vehicle designed to resupply and reboost the International Space Station.
- 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: Manned Maneuvering Unit Target entity description: The Manned Maneuvering Unit is a NASA-developed, backpack-like propulsion system that allowed astronauts to fly untethered in space during early Space Shuttle missions.
-
A.
Apollo Lunar Module
The Apollo Lunar Module was the two-stage spacecraft used by NASA during the Apollo missions to land astronauts on the Moon and return them to lunar orbit.
-
B.
Mobile Servicing System
The Mobile Servicing System is a Canadian-built robotic system on the International Space Station used for assembly, maintenance, and cargo handling in orbit.
-
C.
Orion spacecraft
The Orion spacecraft is NASA’s next-generation crewed space vehicle designed to carry astronauts beyond low Earth orbit on deep-space missions, including journeys to the Moon and eventually Mars.
-
D.
SLIM lunar lander
The SLIM lunar lander is a Japanese spacecraft designed by JAXA to demonstrate high-precision, lightweight landing technology on the Moon’s surface.
-
E.
ATV spacecraft
The ATV spacecraft was an automated European cargo vehicle designed to resupply and reboost the International Space Station.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
NASA spaceflight hardware
ⓘ
astronaut propulsion system ⓘ extravehicular activity equipment ⓘ |
| abbreviation | MMU ⓘ |
| alsoKnownAs | MMU backpack ⓘ |
| compatibleWith | Shuttle Extravehicular Mobility Unit ⓘ |
| controlAxes | six degrees of freedom ⓘ |
| controlMethod | hand controllers ⓘ |
| countryOfOrigin |
United States of America
ⓘ
surface form:
United States
|
| designedForEnvironment | microgravity ⓘ |
| developedBy |
Johnson Space Center
ⓘ
surface form:
NASA Johnson Space Center
|
| developer | NASA ⓘ |
| displayLocation |
Johnson Space Center
ⓘ
National Air and Space Museum, Washington, D.C. ⓘ
surface form:
National Air and Space Museum
|
| era | early Space Shuttle program ⓘ |
| firstFlightDate | 1984-02-07 ⓘ |
| firstUntetheredSpacewalkDate | 1984-02-07 ⓘ |
| firstUsedOnMission |
STS-41B
ⓘ
surface form:
STS-41-B
|
| lastFlightYear | 1984 ⓘ |
| lastUsedOnMission |
STS-51A
ⓘ
surface form:
STS-51-A
|
| mass | approximately 148 kilograms ⓘ |
| maxOperatingDistanceFromShuttle | approximately 100 meters nominal ⓘ |
| maxTranslationSpeed | about 25 meters per second ⓘ |
| mounting | backpack-like unit worn over spacesuit ⓘ |
| notableEvent | first untethered spacewalk by Bruce McCandless II ⓘ |
| notableUser |
Bruce McCandless II
ⓘ
George D. Nelson NERFINISHED ⓘ James D. van Hoften ⓘ
surface form:
James D. A. van Hoften
Joseph P. Allen ⓘ Robert L. Stewart NERFINISHED ⓘ |
| numberOfThrusters | 24 ⓘ |
| operatedIn | low Earth orbit ⓘ |
| primaryFunction | untethered astronaut maneuvering in space ⓘ |
| propellant | gaseous nitrogen ⓘ |
| propulsionType | compressed nitrogen gas thrusters ⓘ |
| reasonForRetirement |
change in mission priorities
ⓘ
safety concerns ⓘ |
| replacedBy |
Manned Maneuvering Unit
self-linksurface differs
ⓘ
surface form:
Simplified Aid for EVA Rescue
|
| safetyFeature | built-in emergency return capability ⓘ |
| status | retired ⓘ |
| thrust | approximately 24 newtons per thruster ⓘ |
| usedFor |
extravehicular activity
ⓘ
satellite repair ⓘ satellite retrieval ⓘ |
| usedOnMission |
STS-41B
ⓘ
surface form:
STS-41-B
STS-41C ⓘ
surface form:
STS-41-C
STS-51A ⓘ
surface form:
STS-51-A
|
| usedOnVehicle | Space Shuttle ⓘ |
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: Manned Maneuvering Unit Description of subject: The Manned Maneuvering Unit is a NASA-developed, backpack-like propulsion system that allowed astronauts to fly untethered in space during early Space Shuttle missions.
Referenced by (6)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Simplified Aid for EVA Rescue
this entity surface form:
test Astronaut Maneuvering Unit