NASA SP17069 NASA Thesaurus Astronomy Vocabulary Scientific and Technical Information Division 1988 National Aeronautics and Space Administration Washington, M= . ' NASA SP-7069 NASA Thesaurus Astronomy Vocabulary A subset of the NASA Thesaurus prepared for the international Astronomical Union Conference July 27-31,1988 This publication was prepared by the NASA Scientific and Technical Information Facility operated for the National Aeronautics and Space Administration by RMS Associates. INTRODUCTION The NASA Thesaurus Astronomy Vocabulary consists of terms used by NASA indexers as descriptors for astronomy-related documents. The terms are presented in a hierarchical format derived from the 1988 edition of the NASA Thesaurus Volume 1 -Hierarchical Listing. Main (postable) terms and non- postable cross references are listed in alphabetical order. READING THE HIERARCHY Each main term is followed by a display of its context within a hierarchy. USE references, UF (used for) references, and SN (scope notes) appear immediately below the main term, followed by GS (generic structure), the hierarchical display of term relationships. The hierarchy is headed by the broadest term within that hierarchy. Terms that are broader in meaning than the main term are listed . above the main term; terms narrower in meaning are listed below the main term. The term itself is in boldface for easy identification. Finally, a list of related terms (RT) from other hierarchies is provided. Within a hierarchy, the number of dots to the left of a term indicates its hierarchical level - the more dots, the lower the level (i.e., the narrower the meaning of the term). For example, the term "ELLIPTICAL GALAXIES" which is preceded by two dots is narrower in meaning than "GALAXIES"; this in turn is narrower than "CELESTIAL BODIES". This relationship can be seen in the hierarchy of any of these ' three terms. While allproader, narrower, and related terms in a hierarchy are main (postable) terms from the NASA Thesaurus, some hierarchy terms do not appear as main terms in the NASA Thesaurus Astronomy Vocabulary The reason is that a term may be part of a hierarchical relationship, but is not itself a valid main entry in an astronomy vocabulary. For example, the displays of "IMPACT DAMAGEw and "METEORITIC DAMAGE" show "DAMAGE" as the broadest term, but there is not a main entry for "DAMAGE", which is too general a term for an astronomy vocabulary. Other features include array terms identified by an infinity symbol which organize related concepts under very general headings; scope notes (SN), which restrict the use of a term to a certain context; and "used for" (UF) terms, which are nonpostable variations of the terms that have been cross refer- enced to the postable main term. TYPICAL HIERARCHICAL LISTING ENTRY POSTABLE TERM -FAR ULTRAVIOLET RADIATION (200 TO 2000 ANGSTROMS) SCOPE NOTE VACUUM ULTRAVIOLET RADIATION / GS ELECTROMAGNETIC RADIATION USED FOR TERM ULTRAVIOLET RADIATION / - FAR ULTRAVlOLET RADLATlON GENERlC STRUCTURE - - . LYMAN ALPHA RADIATION - - LYMAN BETA RADIATION IONIZING RADIATION ULTRAVIOLET RADIATION - FAR ULTRAVIOLET RADIATION . LYMAN ALPHA RADIATION - LYMAN BETA RADlATlON RELATED TERMS -RT BREMSSTRAHLUNG MEGELLAN ULTRAVIOLET ASTRONOMY SATELLITE NEAR ULTRAVIOLET RADIATION x RADIATION ULTRAVIOLET TELESCOPES X RAYS TYPICAL USE CROSS REFERENCE ENTRY NONPQSTABLE TERM b VACUUM ULTRAVIOLET RADIATION ,y_--~cUSE FAR ULTRAVIOLET RADIATION POSTABLE f ERM TYPICAL ARRAY TERM ENTRY ARRAY TERM ----c r CLUSTERS SCOPE SN (USE OF A MORE SPECIFIC TERM IS RECOMMENDED-CONSULT THE TERMS LISTED BELOW) RELATED TERM -RT CLUMPS GALACTIC CLUSTERS GLOBULAR CLUSTERS PLEIADES CLUSTER PRAESEPESTARCLUSTERS STAR CLUSTERS VIRGO GALACTIC CLUSTER NASA THESAURUS ASTRONOMY VOCABULARY resoitmow SPE~-(CONX) ACTIVE GALACTIC NUCLEI-(CONX) SYMBIOTIC STARS . ACllVE GALACTIC NUCLEI ULTRAVIOLET SPECTRA RT ACTlVE GALAXIES A STARS VISIBLE SPECTRUM GALACTIC RADIATION GS CELESTIAL BODIES eo NUCLEI . STARS ACCRETION DISKS QUASARS . EARLY STARS RT ASTROPHYSICS RADIO GALAXIES . HOT STARS BINARY STARS SEYFERT GALAXIES . A STARS BLACK HOLES (ASTRONOMY) RT BLUE STARS COOLING FLOWS (ASTROPHYSICS) ACTIVE QAUXIES PECULIAR STARS DISKS (SHAPES) GS CELESTIAL BODIES WOLF-RAYET STARS ECLIPSING BINARY STARS . GALAXIES GALACTIC NUCLEI . ACTIVE GALAXIES ABIOQENESIS ROTATING DISKS . MARKARIAN GALAXIES GS WOLUTION (MVELOPMENT) STEUAR MASS ACCRETION . RADIO GALAXIES . BIOLOGICAL EVOLUTION X RAY BINARIES . SEYFERT GALAXIES . ABlOaENESUJ RT ACTIVE GALACTIC NUCLEI RT AUTOCATALYSIS ACCUMUUTOAS GALACTIC NUCLEI CHEMICAL EVOLUTION UF COUECTORS GALACTIC RADlATlON LIFE SCIENCES GS ACCUMULATORS QUASARS PANSPERMIA . ACCUMULATORS (COMPUTERS) SPERMATOGENESIS . WST COLLECTORS ACTIVE MAGNETO PARTICLE TRACER . SOLAR COLLECTORS EXPLORERS ABSORPTION BANDS RT ANODES USE AMPTE (SATELLITES) USE ABSORPTION SPECTRA CONCENTRATORS ENTRAPMENT ACTlVE VOLCANOES ABSORPTION SPECTRA FUEL SYSTEMS USE VOLCANOES UF ABSORPTION BANDS PRESSURE VESSELS SPECTRAL ABSORPTION PRESSURIZING ADVANCED ORBITING SOLAR OBSERVATORY GS SPECTRA USE AOSO . RADIATION SPECTRA ACHONDRITES . ABSORPTION SPECTRA GS CELESTIAL BODIES ADVANCED RECONN ELECTRIC SPACECRAFT . FRAUNHOFER LINES . METEORITES UF ARES (SPACECRAm ... HERZBERG BANDS . STONY METEORITES GS INTERPLANETARY SPACECRAFT . TELLURIC LINES ...ACHONWImS . MARS PROBES . SPECTRAL BANDS . BONWC METEORITE . ADVANCED RECONN ELECTRIC . ABSORPTION SPECTRA . KAPOETA ACHONDRITE SPACECRAFT . FRAUNHOFER UNES . NORTON COUNTY ACHONDRITE UNMANNED SPACECRAFT . HERZBERG BANDS RT CHONDRITES . SPACE PROBES . TELLURIC LINES IRON METEORITES . MARS PROBES RT mABSORPTlON . ADVANCED RECONN ELECTRIC BALMER SERIES ACTINOGRAPHS SPACECRAFT m BANDS USE ACTlNOMETERS RT mSPACECRAFT CONTINUOUS RADIATION D UNES ACTINOMETERS ADVANCED X RAY ASTROPHYSICS FACILITY ELECTROMAGNETIC ABSORPTION USE X RAY ASTROPHYSICS FACILITY ELECTROMAGNETIC SPECTRA UF ACTINOGRAPHS ELECTRON SPECTROSCOPY EMISSOGRAPHS ELECTRONIC SPECTRA GS MEASURING INSTRUMENTS ADVECTION , RADIATION MEASURING INSTRUMENTS RT ATMOSPHERIC CIRCULATION EMISSION SPECTRA CONVECTION ENERGY SPECTRA . ACTINOMETERS . INFRARED SPECTROMETERS HEAT TRANSFER FRAUNHOFER LlNE DISCRIMINATORS PECLET NUMBER GALACTIC NUCLEI . PYRANOMETERS GAMMA RAY ABSORPTIOMETRY . RADIOMETERS AERONOMY H ALPHA LlNE . DlCKE RADIOMETERS . INFRARED DETECTORS RT AIRGLOW H BETA LlNE ALPINE METEOROLOGY H GAMMA LlNE . INFRARED SCANNERS . MICROWAVE RADIOMETERS ATMOSPHERIC COMPOSITION H LINES ATMOSPHERIC PHYSICS IONIZING RADIATION . PASSIVE L-BAND RADIOMETERS . PRESSURE MODULATOR AURORAS K UNES DIAL SATELLITE LASER SPECTROMETERS RADIOMETERS . SPECTRORADIOMETERS GEOPHYSICS LlNE SPECTRA MAGNETOSPHERE-IONOSPHERE MICROWAVE SPECTRA . SOLAR SPECTROMETERS . SPECTROHELIOGRAPHS COUPLING MOLECULAR SPECTRA MESOMETEOROLOGY MOLECULAR SPECTROSCOPY . SPECTROPHOTOMETERS METEOROLOGY OSCILLATOR STRENGTHS . INFRARED SPECTROPHOTOMETERS POLAR CUSPS PARAMAGNETIC RESONANCE UPPER ATMOSPHERE PASCHEN SERIES . ULTRAVIOLET PHOTOACOUSTIC SPECTROSCOPY SPECTROPHOTOMETERS PHOTOLUMINESCENT BANDS . ULTRAVIOLET DETECTORS AEROPHYSICS PHOTON ABSORPTIOMETRY . ULTRAVIOLET SPECTROMETERS USE ATMOSPHERIC PHYSICS RAMAN SPECTRA . ULTRAVIOLET RYDBERG SERIES SPECTROPHOTOMETERS AEROSPACE ENVIRONMENTS SCHUMANN-RUNGE BANDS RT DOSIMETERS SN (EXCLUDES SPACECRAFT SELF ABSORPTION FABRY-PEROT SPECTROMETERS INTERVEHICULAR ENVIRONMENTS) SOLAR SPECTRA FIELD INTENSITY METERS UF SPACE ENVISONMENT SOLAR SPECTROMETERS SPECTROMETERS GS ENVIRONMENTS SPECTRUM ANALYSIS . AEROSPACE ENVIRONMENTS SPIN TEMPERATURE ACTIVE GALACTIC NUCLEI . CISLUNAR SPACE STELLAR SPECTRA GS GALACTIC NUCLEI . DEEP SPACE AFTERGLOWS AEROSPACE ENVIRONM~(WN~) Am AMOR ASTEROID-(CONT.) . INTERPLANETARY SPACE 0s ALBEDO . ASTEROID BELTS . INTERSTELLAR SPACE . COSMIC RAY ALBEDO . ASTEROIDS . EARTH ORBITAL ENVIRONMENTS . EARTH ALBEDO . AMOR ASTEROID RT mAEROSPACE SCIENCES . LUNAR ALBEDO RT ASTRONOMY ARGONQXYGEN ATMOSPHERES RT ABSORPTANCE JUPITER (PLANET) mASTRONAUTICS COSMIC RAYS MARS (PLANET) BlOASFRONAUTlCS EARTH RADIATION BUDGET PLANETARY ORBITS BlOmOCESSlNG EXPERIMENT SOLAR SYSTEM BIOSATELUTES OPTICAL PROPERTIES COSMIC RAYS PlANETARY RADIATION Anuwmrn ASTEROID rn ATMOSPHERE R-ANCE GS CELESTIAL BODIES E~OMAGN€llC RADIATION SOLAR RADIATION . ASTEROID BELTS EXOBIOLOGY SURFACE PROPERTIES . ASTEROIDS EXTRATERRESTRIAL ENVIRONMENTS . AMPHITRITE ASTEROID €XrRATERRESTRIAL UFE ALLENM mourn RT GALIEO PROJECT ~XTRATERRESTRIAL RADIATION GS CELESTIAL BODIES EXTRAVEHICULAR ACTIVITY . METEORITES AMPLITUDES GEOPHYSICAL FLUID FLOW CELLS . STONY METEORITES GS AMPLITUDES HAZARDOUS MATERIAL DISPOSAL (IN . CHONDRITES . PULSE AMPLITUDE SPACE) . CARBONACEOUS CHONDRITES . SCAlTERING AMPLITUDE HELIUM-OXYGEN ATMOSPHERES . ALLENDE METEORITE RT AMPLIFICATION JUPITER ATMOSPHERE CYCLES LIFE SUPPORT SYSTEMS ALMUCANTAR DIMENSIONS LUNAR ENVIRONMENT USE ELEVATION ANGLE DISPLACEMENT MANNED SPACE FLIGHT FREQUENCIES MARS-ATM~SPHERE m INTENSITY NEPTUNE ATMOSPHERE ALSEP LEVEL (QUANTITY) PANSPERMIA USE APOLLO LUNAR SURFACE EXPERIMENTS MAGNITUDE PLANETARY ENVIRONMENTS PACKAGE OSCILLATIONS RADIATION BELTS PHASE DEVIATION SOLAR RADIATION ALTIMETERS PICOSECOND PULSES SPACE EXPLORATION GS MEASURING INSTRUMENTS PULSES SPACE FLIGHT . DISTANCE MEASURING EQUIPMENT STANDING WAVE RATIOS SPACE HABITATS . ALTIMETERS VIBRATION SPACE MANUFACTURING . LASER ALTIMETERS RADIO ALTIMETERS SPACEBORNE EXPERIMENTS . AMrn (SATELLnES) SPACECRAFT CABIN SIMULATORS RT AIRCRAFT INSTRUMENTS SN (ACTIVE MAGNETOSPHERIC PARTICLE THERMAL ENVIRONMENTS ALTlMETRY TRACER EXPLORERS) URANUS ATMOSPHERE .