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Glossary

AMU

Astronaut Maneuvering Unit

Apollo

NASA project that landed astronauts on the Moon

CCA

Communications Carrier Assembly

CCC

Contaminant Control Cartridge

Composite Material

Substance derived by combining two or more materials such as glass fibers and epoxy

DCM

Displays and Control Module

EEH

EMU Electrical Harness

EMU

Extravehicular Mobility Unit

EVA

Extravehicular Activity; Extravehicular Visor Assembly

Gemini

NASA project that pioneered space flight technologies for spacecraft rendezvous and docking and spacewalking

HHMU

Hand-Held Maneuvering Unit

HUT

Hard Upper Torso

IDB

In-Suit Drink Bag

ISS

International Space Station

Joule

One newton meter or 1 kg • m2/s2

Kilopascal

Metric pressure unit; one pound per square inch pressure equals 6.895 kilopascals

Kinetic Energy

Energy in motion

LCVG

Liquid Cooling-and-Ventilation Garment

MAG

Maximum Absorption Garment

Microgravity

An environment, produced by free-fall, that alters the local effects of gravity and makes objects seem weightless

Micrometeoroid

Tiny particle of space debris (natural or artificial) ravling at high speed through space

MMU

Manned Maneuvering Unit

Mercury

The NASA project that launched the first U.S. astronauts into space and demonstrated that humans could live and work in space

ORU

Orbital replacement unit

PLSS

Primary Life-Support System

Regolith

Sediment derived directly from igneous rock and not containing any organically-derived materials

RMS

Remote Manipulator System

SCU

Service and Cooling Umbilical

Skylab

First U.S. space station

SOP

Secondary Oxygen Pack

SAFER

Self-rescue rocket backpack device for use during spacewalks around the International Space Station

Space Shuttle

Reusable spaceship currently used for all U.S. manned space missions

Spacewalk

Extravehicular activity

Sublimation

Change of state of matter from a solid to a gas


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