A&A: Astronomy and Astrophysics

AAO: Anglo-Australian Observatory

AAS: American Astronomical Society

AAS: American Astronautical Society

AAVSO: American Association of Variable Star Observers

ACE: Advanced Composition Explorer

ACRV: Assured Crew Return Vehicle (ou) Astronaut Crew Rescue Vehicle

ADFRF: Ames-Dryden Flight Research Facility (agora DFRC) (NASA)

AGN: Active Galactic Nucleus

AGU: American Geophysical Union

AIAA: American Institute of Aeronautics and Astronautics

AIPS: Astronomical Image Processing System

AJ: Astronomical Journal

ALEXIS: Array of Low Energy X-ray Imaging Sensors

ALPO: Association of Lunar and Planetary Observers

ALS: Advanced Launch System

ANSI: American National Standards Institute

AOA: Abort Once Around (plano de aborto do vaivém)

AOA: Angle Of Attack

AOCS: Attitude and Orbit Control System

Ap.J: Astrophysical Journal

APL: Applied Physics Laboratory (em Johns Hopkins)

APM: Attached Pressurized Module

APU: Auxiliary Power Unit

ARC: Ames Research Center (NASA)

ARC: Astrophysical Research Consortium

ARTEMIS: Advanced Relay TEchnology MISsion 

ASA: Astronomical Society of the Atlantic

ASI: Agenzia Spaziale Italiana

ASP: Astronomical Society of the Pacific

ASRM: Advanced Solid Rocket Motor

ATDRS: Advanced Tracking and Data Relay Satellite 

ATLAS: Atmospheric Laboratory for Applications and Science

ATM: Amateur Telescope Maker

ATM: Apollo Telescope Mount (no Skylab)

ATO: Abort To Orbit (plano de aborto do vaivém)

AU: Astronomical Unit

AURA: Association of Universities for Research in Astronomy

AW&ST: Aviation Week & Space Technology (AvLeak)

AXAF: Advanced X-ray Astrophysics Facility

BAe: British Aerospace

BATSE: Burst And Transient Source Experiment (incluído no CGRO)

BBXRT: Broad-Band X-Ray Telescope (incluído no ASTRO)

BDB: Big Dumb Booster

BEM: Bug-Eyed Monster

BH: Black Hole

BIMA: Berkeley Illinois Maryland Array

BIS: British Interplanetary Society

BMDO: Ballistic Missile Defense Office (era SDIO) 

BNSC: British National Space Centre

CARA: Center for Astrophysical Research in Antarctica

C&T: Communications & Tracking

CATS: Cheap Access To Space

CCAFS: Cape Canaveral Air Force Station (agora CCAS)

CCAS: Cape Canaveral Air Station

CCD: Charge-Coupled Device

CCDS: Centers for the Commercial Development of Space

CFA: Center For Astrophysics

CFF: Columbus Free Flyer

CFHT: Canada-France-Hawaii Telescope

CG: Center of Gravity

CGRO: (Arthur Holley) Compton Gamma Ray Observatory (era GRO)

CHARA: Center for High Angular Resolution Astronomy

CIRRIS: Cryogenic InfraRed Radiance Instrument for Shuttle

CIT: Circumstellar Imaging Telescope

CM: Command Module (nave Apollo)

CM: Center of Mass

CMBR: Cosmic Microwave Background Radiation 

CMCC: Central Mission Control Centre (ESA)

CNES: Centre National d'Etude Spatiales

CNO: Carbon-Nitrogen-Oxygen

CNSR: Comet Nucleus Sample Return

COBE: COsmic Background Explorer

COMPTEL: COMPton TELescope (incluído no CGRO)

COSTAR: Corrective Optics Space Telescope Axial Replacement

CRAF: Comet Rendezvous / Asteroid Flyby

CRRES: Combined Release / Radiation Effects Satellite

CSM: Command and Service Module (nave Apollo)

CSTC: Consolidated Space Test Center (USAF)

CTIO: Cerro Tololo Interamerican Observatory

CV: Cataclysmic Variable

CXBR: Cosmic X-ray Background Radiation

DC: Delta Clipper

DCX: Delta Clipper eXperimental

DDCU: DC-to-DC Converter Unit

DFRC: Dryden Flight Research Center

DFRF: Dryden Flight Research Facility (era ADFRF, agora DFRC)

DMSP: Defense Meteorological Satellite Program 

DOD: Department Of Defense (por vezes DoD)

DRS: Data Relay Satellite

DRS: Direct Receiving Station

DSCS: Defense Satellite Communications System 

DSN: Deep Space Network

DSP: Defense Support Program (USAF/NRO)

EDO: Extended Duration Orbiter

EGRET: Energetic Gamma Ray Experiment Telescope (incluído no CGRO)

EJASA: Electronic Journal of the Astronomical Society of the Atlantic

ELV: Expendable Launch Vehicle

EMU: Extravehicular Mobility Unit

EOS: Earth Observing System

ER: Eastern Range (era ETR)

ERS: Earth Resources Satellite (como em ERS-1)

ESA: European Space Agency

ESIS: European Space Information System

ESO: European Southern Observatory

ET: External Tank (vaivém)

ETR: Eastern Test Range

EUV: Extreme UltraViolet

EUVE: Extreme UltraViolet Explorer

EVA: ExtraVehicular Activity

FAST: Fast Auroral SnapshoT explorer

FFT: Fast Fourier Transform

FGS: Fine Guidance Sensors (incluído no HST)

FHST: Fixed Head Star Trackers (idem)

FIR: Far InfraRed

FOC: Faint Object Camera (icluído no HST)

FOS: Faint Object Spectrograph (idem)

FRC: Flight Research Center

FRR: Flight-Readiness Review

FTS: Flight Telerobotic Servicer

FUSE: Far Ultraviolet Spectroscopic Explorer

GBT: Green Bank Telescope

GCVS: General Catalog of Variable Stars

GEM: Giotto Extended Mission 

GEM: Galileo Extended (ou Europa) Mission 

GEO: Geosynchronous Earth Orbit

GDS: Great Dark Spot

GHRS: Goddard High Resolution Spectrograph (incluído no HST)

GLOMR: Global Low-Orbiting Message Relay

GLOW: Gross Lift-Off Weight

GMC: Giant Molecular Cloud

GMRT: Giant Meter-wave Radio Telescope

GMT: Greenwich Mean Time (também chamado UT)

GOES: Geostationary Orbiting Environmental Satellite

GOX: Gaseous OXygen

GPC: General Purpose Computer

GPS: Global Positioning System

GR: General Relativity

GRO: Gamma Ray Observatory (agora CGRO)

GRS: Gamma Ray Spectrometer (incluído no Mars Observer)

GRS: Great Red Spot

GSC: Guide Star Catalog (para o HST)