A B C D E F G H I J K L M N O P Q R S T U V W X Y Z | ||||
Description | alt | broader | narrower | related |
---|---|---|---|---|
pair annihilation (pairAnnihilation) | ||||
pair annihilation |
electron
, gamma-ray radiation , positron |
|||
pair production (pairProduction) | ||||
pair production |
particle production |
electron
, gamma-ray radiation , positron |
||
paleomagnetism (paleomagnetism) | ||||
paleomagnetism |
continental drift
, geomagnetism , magnetic field |
|||
palladium (palladium) | ||||
palladium (atomic number 46) |
Pd | fundamental chemical element | ||
FVH: new (2007-OCT-25) | ||||
parabolic antenna (parabolicAntenna) | ||||
parabolic antenna |
parabolic antennas |
antenna
, directional antenna |
Cassegrain focus | |
parabolic mirror (parabolicMirror) | ||||
parabolic mirror |
parabolic reflector | |||
see parabolic reflector | ||||
parabolic orbit (parabolicOrbit) | ||||
parabolic orbit |
orbit |
circular orbit
, comet , elliptical orbit , hyperbolic orbit |
||
parabolic reflector (parabolicReflector) | ||||
parabolic reflector |
dish antenna
, parabolic mirror , radar telescope , radio telescope , reflecting telescope |
|||
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z | ||||
Description | alt | broader | narrower | related |
parabolic velocity (parabolicVelocity) | ||||
parabolic velocity |
velocity |
escape velocity
, orbit |
||
parahydrogen (parahydrogen) | ||||
parahydrogen |
molecular hydrogen | orthohydrogen | ||
parallax (parallax) | ||||
parallax |
annual parallax
, diurnal parallax , dynamical parallax , kinematic parallax , moving cluster parallax , photometric parallax , secular parallax , statistical parallax , trigonometric parallax |
Astronomical Unit
, astrometry , distance , distance modulus |
||
parallel computer (parallelComputer) | ||||
parallel computer |
computer | |||
FVH: new (2007-SEP-21) | ||||
parametric amplifier (parametricAmplifier) | ||||
parametric amplifier |
amplifier | |||
parsec (parsec) | ||||
parsec |
parallax second |
Astronomical Unit
, distance , distance scale , light year |
||
partial eclipse (partialEclipse) | ||||
partial eclipse |
eclipse |
eclipsing binary star
, total eclipse |
||
particle acceleration (particleAcceleration) | ||||
particle acceleration |
elementary particle | |||
particle accretion (particleAccretion) | ||||
particle accretion |
accretion | |||
particle beam (particleBeam) | ||||
particle beam |
high-energy astrophysics | |||
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z | ||||
Description | alt | broader | narrower | related |
particle creation (particleCreation) | ||||
particle creation |
elementary particle | |||
particle escape (particleEscape) | ||||
particle escape |
elementary particle | |||
particle interaction (particleInteraction) | ||||
particle interaction |
elementary particle | |||
particle (particle) | ||||
particle |
alpha particle
, boson , electron , elementary particle , fundamental particle , ion , lepton , neutrino , plasma , positron , proton , relativistic particle |
|||
only the broad classes are shown below; specific type will be found under these, or from the hierarchical list | ||||
particle production (particleProduction) | ||||
particle production |
pair production | elementary particle | ||
particle propagation (particlePropagation) | ||||
particle propagation |
||||
Paschen-Back effect (PaschenBackEffect) | ||||
Paschen-Back effect |
Zeeman splitting
, magnetic field |
|||
Paschen series (PaschenSeries) | ||||
Paschen series |
Paschen line | hydrogen spectrum |
Balmer series
, Brackett series , Lyman series , Pfund series |
|
past light cone (pastLightCone) | ||||
past light cone |
light cone | future light cone | ||
Paul trap (PaulTrap) | ||||
Paul trap |
electric field
, ion , radio frequency |
|||
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z | ||||
Description | alt | broader | narrower | related |
p branch (pBranch) | ||||
p-branch |
molecular spectrum | |||
P Cygni line profile (PCygniLineProfile) | ||||
P Cygni line profile |
line profile |
S Doradus star
, emission line star , mass-loss , shell star , symbiotic star |
||
peculiar galaxy (peculiarGalaxy) | ||||
peculiar galaxy |
galaxy
, peculiar object |
Ep galaxy
, Seyfert galaxy , compact galaxy , dwarf galaxy , emission line galaxy , interacting galaxy , ring galaxy |
Markarian galaxy | |
peculiar giant (peculiarGiant) | ||||
peculiar giant star |
giant
, peculiar star |
|||
peculiar motion (peculiarMotion) | ||||
peculiar motion |
Local Standard of Rest
, peculiar velocity , proper motion , radial velocity , stellar motion |
|||
peculiar object (peculiarObject) | ||||
peculiar object |
peculiar galaxy
, peculiar star |
|||
combine with other terms | ||||
peculiar star (peculiarStar) | ||||
peculiar star |
peculiar object |
Ap star
, Bp star , heavy metal star , holmium star , magnetic star , peculiar giant , peculiar variable star |
abnormal spectrum
, abundance , chemical composition , emission line star |
|
only the broad classes are shown below; specific type will be found under these, or from the hierarchical list | ||||
peculiar variable star (peculiarVariableStar) | ||||
peculiar variable star |
peculiar star
, variable star |
|||
peculiar velocity (peculiarVelocity) | ||||
peculiar velocity |
velocity |
Local Standard of Rest
, peculiar motion , radial velocity , stellar motion |
||
pencil beam (pencilBeam) | ||||
pencil beam |
Mills cross antenna
, radio interferometer |
|||
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z | ||||
Description | alt | broader | narrower | related |
pendulum (pendulum) | ||||
pendulum |
timing equipment |
geodesy
, gravity , oscillation |
||
Penrose process (PenroseProcess) | ||||
Penrose process |
black hole | |||
penumbral filament (penumbralFilament) | ||||
penumbral filament |
penumbra | |||
penumbra (penumbra) | ||||
penumbra |
penumbras |
Wilson effect
, eclipse , lunar eclipse , penumbral filament , solar eclipse , sunspot , umbra |
||
periapsis (periapsis) | ||||
periapsis |
periastron
, perihelion |
|||
periastron (periastron) | ||||
periastron |
apsis |
apastron
, periapsis |
||
pericenter (pericenter) | ||||
pericenter |
center of mass | |||
perigee (perigee) | ||||
perigee |
apsis |
Earth
, Moon , apogee |
||
perihelion (perihelion) | ||||
perihelion |
apsis |
Earth orbit
, aphelion , periapsis , planet |
||
period-age relation (periodAgeRelation) | ||||
period-age relation |
period age relation | statistical relation |
Cepheid
, period-color relation , period-density relation , period-luminosity-color relation , period-luminosity relation , period-mass relation , period-radius relation , period-spectrum relation |
|
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z | ||||
Description | alt | broader | narrower | related |
period change (periodChange) | ||||
period change |
period variation |
binary star
, pulsating variable star |
||
period-color relation (periodColorRelation) | ||||
period-color relation |
period color relation | statistical relation |
Cepheid
, period-age relation , period-density relation , period-luminosity-color relation , period-luminosity relation , period-mass relation , period-radius relation , period-spectrum relation , pulsating variable star , radius-luminosity relation |
|
period-density relation (periodDensityRelation) | ||||
period-density relation |
period density relation | statistical relation |
period-age relation
, period-color relation , period-luminosity-color relation , period-luminosity relation , period-mass relation , period-radius relation , period-spectrum relation , pulsating variable star , radius-luminosity relation |
|
period determination (periodDetermination) | ||||
period determination |
binary star
, variable star , waveform analysis |
|||
periodic comet (periodicComet) | ||||
periodic comet |
comet | |||
periodic orbit (periodicOrbit) | ||||
periodic orbit |
orbit | elliptical orbit | ||
periodic variable star (periodicVariableStar) | ||||
periodic variable star |
pulsating variable star
, rotating star |
multi-periodic variable star | ||
FVH: new (2007-OCT-8) | ||||
period-luminosity-color relation (periodLuminosityColorRelation) | ||||
period-luminosity-color relation |
PLC relation
, period luminosity color relation |
statistical relation |
Cepheid
, period-age relation , period-color relation , period-density relation , period-luminosity relation , period-mass relation , period-radius relation , period-spectrum relation , pulsating variable star , radius-luminosity relation |
|
period-luminosity relation (periodLuminosityRelation) | ||||
period-luminosity relation |
PL relation
, period luminosity relation |
statistical relation |
Cepheid
, period-age relation , period-color relation , period-density relation , period-luminosity-color relation , period-mass relation , period-radius relation , period-spectrum relation , pulsating variable star , radius-luminosity relation |
|
period-mass relation (periodMassRelation) | ||||
period-mass relation |
period mass relation | statistical relation |
period-age relation
, period-color relation , period-density relation , period-luminosity-color relation , period-luminosity relation , period-radius relation , period-spectrum relation , pulsating variable star , radius-luminosity relation |
|
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z | ||||
Description | alt | broader | narrower | related |
period (period) | ||||
period |
orbital element
, photometric element |
binary star
, cycle , light curve , orbit , phase wave , planet , pulsating variable star , pulsation mode , rotation , variable star , velocity curve |
||
period-radius relation (periodRadiusRelation) | ||||
period-radius relation |
period radius relation | statistical relation |
Cepheid
, period-age relation , period-color relation , period-density relation , period-luminosity-color relation , period-luminosity relation , period-mass relation , period-spectrum relation , pulsating variable star , radius-luminosity relation |
|
period-spectrum relation (periodSpectrumRelation) | ||||
period-spectrum relation |
period spectrum relation | statistical relation |
Cepheid
, period-age relation , period-color relation , period-density relation , period-luminosity-color relation , period-luminosity relation , period-mass relation , period-radius relation , pulsating variable star , radius-luminosity relation |
|
peripheral (peripheral) | ||||
peripheral |
computer
, instrument |
|||
combine with other terms | ||||
perturbation (perturbation) | ||||
perturbation |
N-body problem
, celestial mechanics , orbit , osculatory element , perturbation theory , three-body problem |
|||
perturbation theory (perturbationTheory) | ||||
perturbation theory |
celestial mechanics
, gravitation , orbit , perturbation |
|||
petrology (petrology) | ||||
petrology |
geology |
planet
, surface of celestial body |
||
Pfund series (PfundSeries) | ||||
Pfund series |
hydrogen spectrum
, infrared radiation |
Balmer series
, Brackett series , Lyman series , Paschen series |
||
PG1159 star (Pg1159Star) | ||||
PG1159 star |
GW Virginis star
, PG1159-35 star |
DO star
, multi-periodic variable star |
||
ES: new (2007-OCT-8) | ||||
phase angle (phaseAngle) | ||||
phase angle |
Moon
, lunar phase , planet |
|||
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z | ||||
Description | alt | broader | narrower | related |
phased array (phasedArray) | ||||
phased array |
array |
phase wave
, radio interferometer |
||
phase defect (phaseDefect) | ||||
phase defect |
Moon
, lunar phase , obliquity of ecliptic |
|||
phase difference (phaseDifference) | ||||
phase difference |
phase wave | |||
phase effect (phaseEffect) | ||||
phase effect |
lunar phase | |||
phase error (phaseError) | ||||
phase error |
phase wave | |||
phase function (phaseFunction) | ||||
phase function |
phase wave
, radiation scattering |
|||
phase rotator (phaseRotator) | ||||
phase rotator |
phase wave
, radio telescope |
|||
phase sensitive detector (phaseSensitiveDetector) | ||||
phase sensitive detector |
phase switching interferometer
, phase wave , receiver |
|||
phase shift (phaseShift) | ||||
phase shift |
phase-shift |
light curve
, phase wave , variable star , velocity curve |
||
phase space (phaseSpace) | ||||
phase space |
phase wave
, velocity space |
|||
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z | ||||
Description | alt | broader | narrower | related |
phase switching interferometer (phaseSwitchingInterferometer) | ||||
phase switching interferometer |
interferometer |
phase sensitive detector
, phase wave |
||
phase switching (phaseSwitching) | ||||
phase switching |
phase wave
, radio telescope , receiver |
|||
phase wave (phaseWave) | ||||
phase of a repeating wave |
binary star
, light curve , period , phase difference , phase error , phase function , phase rotator , phase sensitive detector , phase shift , phase space , phase switching , phase switching interferometer , phased array , variable star , velocity curve |
|||
Phillips band (PhillipsBand) | ||||
Phillips band |
infrared radiation
, molecular band , molecular spectrum |
|||
phosphorescence (phosphorescence) | ||||
phosphorescence |
image tube
, phosphorescent scintillation , phosphorus , scintillation counter |
|||
phosphorescent scintillation (phosphorescentScintillation) | ||||
phosphorescent scintillation |
scintillation |
cosmic ray shower
, image tube , phosphorescence , scintillation counter |
||
phosphorus (phosphorus) | ||||
phosphorus (atomic number 15) |
P | fundamental chemical element | phosphorescence | |
FVH: new (2007-OCT-25) | ||||
photocathode (photocathode) | ||||
photocathode |
cathode
, electrode |
image tube
, photomultiplier tube |
||
photochemistry (photochemistry) | ||||
photochemistry |
photographic developer
, photographic material , photographic processing |
|||
photoconductive cell (photoconductiveCell) | ||||
photoconductive cell |
photomultiplier tube | |||
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z | ||||
Description | alt | broader | narrower | related |
photodiode (photodiode) | ||||
photodiode |
photoelectronic device | avalanche photodiode | photometry | |
photodissociation (photodissociation) | ||||
photodissociation |
absorption | |||
photoelectric instrument (photoelectricInstrument) | ||||
photoelectric instrument |
image tube
, photomultiplier tube |
|||
photoelectric magnitude (photoelectricMagnitude) | ||||
photoelectric magnitude |
apparent magnitude |
photographic magnitude
, photovisual magnitude |
||
photoelectric photometer (photoelectricPhotometer) | ||||
photoelectric photometer |
photometer | |||
photoelectric photometry (photoelectricPhotometry) | ||||
photoelectric photometry |
photometry |
broad band photometry
, medium band photometry , narrow band photometry |
CCD photometry
, photographic photometry |
|
photoelectronic device (photoelectronicDevice) | ||||
photoelectronic device |
avalanche photodiode
, charge-coupled device , charge-injection device , charge-transfer device , image tube , photodiode , photomultiplier tube , television detector |
|||
photogrammetry (photogrammetry) | ||||
photogrammetry |
map
, photograph , photography |
|||
photographic astrometry (photographicAstrometry) | ||||
photographic astrometry |
astrometry | proper motion | ||
photographic developer (photographicDeveloper) | ||||
photographic developer |
photochemistry
, photographic processing , photograph |
|||
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z | ||||
Description | alt | broader | narrower | related |
photographic emulsion (photographicEmulsion) | ||||
photographic emulsion |
detector
, photographic material |
halation
, photographic film , photographic plate , photograph , photography , quantum efficiency , turbidity |
||
photographic film (photographicFilm) | ||||
photographic film |
film [photographic] | photographic material |
photographic emulsion
, photograph , photography |
|
photographic filter (photographicFilter) | ||||
photographic filter |
optical filter | |||
photographic instrument (photographicInstrument) | ||||
photographic instrument |
Schmidt camera
, Schmidt telescope , camera |
|||
photographic magnitude (photographicMagnitude) | ||||
photographic magnitude |
apparent magnitude |
photoelectric magnitude
, photovisual magnitude |
||
photographic material (photographicMaterial) | ||||
photographic material |
photographic emulsion
, photographic film , photographic plate |
photochemistry
, photograph |
||
photographic photometry (photographicPhotometry) | ||||
photographic photometry |
photometry | broad band photometry |
CCD photometry
, photoelectric photometry |
|
photographic plate (photographicPlate) | ||||
photographic plate |
photographic material |
photographic emulsion
, photograph , photography , reseaux |
||
photographic processing (photographicProcessing) | ||||
photographic processing |
darkroom
, photochemistry , photographic developer , photography , unsharp masking |
|||
photograph (photograph) | ||||
photograph |
image |
camera
, microdensitometer , photogrammetry , photographic developer , photographic emulsion , photographic film , photographic material , photographic plate |
||
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z | ||||
Description | alt | broader | narrower | related |
photography (photography) | ||||
photography |
astrophotography |
all-sky photography
, color photography , false color photography , spectrography , streak photography , ultraviolet photography |
HD curve
, astronomical technique , camera , darkroom , edge effect , image , microphotometer , observing technique , photogrammetry , photographic emulsion , photographic film , photographic plate , photographic processing , unsharp masking |
|
photoheliograph (photoheliograph) | ||||
photoheliograph |
spectroheliograph | |||
photoionization (photoionization) | ||||
photoionization |
photoionisation UK | ionization |
absorption
, aurora , electron , recombination |
|
photoluminescence (photoluminescence) | ||||
photoluminescence |
light emission | X-ray fluorescence | fluorescence | |
photometer (photometer) | ||||
photometer |
optical instrument
, telescope instrument |
high-speed photometer
, photoelectric photometer , spectrophotometer |
CCD detector
, bolometer , infrared detector , photometry , photomultiplier tube , polarimeter , radiometer , ultraviolet detector |
|
photometric element (photometricElement) | ||||
photometric element |
light curve
, maximum , minimum , period |
eclipsing binary star | ||
photometric parallax (photometricParallax) | ||||
photometric parallax |
parallax | photometry | ||
photometric standard star (photometricStandardStar) | ||||
photometric standard star |
standard star |
photometry
, standard candle |
||
photometric system (photometricSystem) | ||||
photometric system |
Bessel photometry
, Cape photometry , DDO photometry , Geneva photometry , Gunn photometry , HST photometry , Johnson photometry , Kron-Cousins photometry , Sloan photometry , Stromgren photometry , Walraven photometry , rgb photometry |
apparent magnitude
, photometry |
||
photometry (photometry) | ||||
photometry |
filter photometry |
astronomical technique
, observing technique |
CCD photometry
, infrared photometry , multi-color photometry , photoelectric photometry , photographic photometry , surface photometry , ultraviolet photometry |
Purkinje effect
, apparent magnitude , automatic patrol telescope , avalanche photodiode , color , color equation , color excess , color index , color-luminosity relation , color-magnitude relation , drift scan , e region , effective temperature , f region , interference filter , intrinsic color , magnitude , optical filter , photodiode , photometer , photometric parallax , photometric standard star , photometric system , polarimetry , spectrophotometry , standard candle , two-color diagram |
only the broad classes are shown below; specific type will be found under these, or from the hierarchical list | ||||
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z | ||||
Description | alt | broader | narrower | related |
photomultiplier tube (photomultiplierTube) | ||||
photomultiplier tube |
photocell
, photoelectric cell |
detector
, photoelectric instrument , photoelectronic device |
amplifier
, cathode , electrode , photocathode , photoconductive cell , photometer , quadrant detector , quantum efficiency , scintillation counter |
|
photon counting system (photonCountingSystem) | ||||
photon counting system |
counter | |||
photon (photon) | ||||
photon |
boson
, elementary particle |
electromagnetic radiation
, inverse Compton effect , inverse Compton scattering , meson , quanta , radiation , radiation pressure , radiation scattering , radiative recombination |
||
photosphere (photosphere) | ||||
photosphere |
reversing layer |
Sun
, chromosphere , continuum radiation , facula , granulation , granule , solar surface , surface brightness , surface of celestial body |
||
ALT reversing_layer seems old-fashioned (IAU)! | ||||
photovisual magnitude (photovisualMagnitude) | ||||
photovisual magnitude |
apparent magnitude |
V magnitude
, photoelectric magnitude , photographic magnitude , visual magnitude |
||
photovoltaic cell (photovoltaicCell) | ||||
photovoltaic cell |
semiconductor device | |||
physical constant (physicalConstant) | ||||
physical constant |
fundamental constant | constant |
Planck constant
, gravitational constant , velocity of light |
astronomical constant |
FVH: renamed (see constant) (2007-OCT-11) | ||||
pion (pion) | ||||
pion |
boson
, elementary particle |
|||
pitch angle (pitchAngle) | ||||
pitch angle |
Galactic structure
, galaxy structure , spiral arm , spiral galaxy |
|||
pixel (pixel) | ||||
pixel |
picture element
, voxel |
detector
, resolution , two-dimensional detector |
||
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z | ||||
Description | alt | broader | narrower | related |
plage (plage) | ||||
flocculi plage solar plage |
chromosphere
, facula , sunspot |
|||
Planck black body formula (PlanckBlackBodyFormula) | ||||
Planck black body formula |
Planck constant
, electromagnetic radiation , radiation |
|||
Planck constant (PlanckConstant) | ||||
Planck's constant h |
physical constant | Planck black body formula | ||
plane polarization (planePolarization) | ||||
plane polarization |
linear polarization
, plane polarisation UK |
light polarization |
circular polarization
, half-wave plate |
|
FVH: added ALT linear polarization (2007-SEP-21) | ||||
planetarium (planetarium) | ||||
planetarium |
motion
, observatory , orrery |
|||
planetar (planetar) | ||||
planetar |
stellar object |
brown dwarf
, planet |
||
FVH: new (2007-OCT-12) | ||||
planetary alignment (planetaryAlignment) | ||||
alignment of planet, etc. |
Solar System
, celestial mechanics , planet |
|||
planetary microlensing (planetaryMicrolensing) | ||||
microlensing of exoplanet |
gravitational microlensing | planet | ||
FVH: new (2007-OCT-8) | ||||
planetary nebula (planetaryNebula) | ||||
planetary nebula |
emission nebula
, evolved star , nebula |
Harman-Seaton sequence
, ansa , central star , emission line star , exciting star , mass-loss , ring nebula |
||
planetary (planetary) | ||||
planetary |
||||
see sn for planet | ||||
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z | ||||
Description | alt | broader | narrower | related |
planetary ring (planetaryRing) | ||||
planetary ring |
ring |
Roche limit
, planet , resonance gap , ring division , shepherd satellite |
||
planetary system (planetarySystem) | ||||
planetary system |
Solar System | |||
planetary theory (planetaryTheory) | ||||
planetary theory |
Solar System
, celestial mechanics |
|||
planetesimal (planetesimal) | ||||
planetesimal |
Solar System
, asteroid , planet , protoplanet , satellite |
|||
planetology (planetology) | ||||
planetology |
geology | |||
planet (planet) | ||||
planet |
rotating body |
Earth
, Jupiter , Mars , Mercury , Neptune , Saturn , Uranus , Venus , extrasolar planet , giant planet , hypothetical planet , inner planet , outer planet |
Bodes law
, Roche limit , Solar System , aeronomy , aphelion , astrology , atmosphere , boundary layer , center of mass , collision , composition , core , crater , crust , dust storm , dwarf planet , equatorial bulge , evolution , exosphere , galilean satellite , geology , geomagnetism , greenhouse effect , interior , lithosphere , mantle , map , mean equinox , oblateness , occultation , orbit determination , orbit , origin , perihelion , period , petrology , phase angle , planetar , planetary alignment , planetary microlensing , planetary ring , planetesimal , polar cap , polar region , protoplanet , resonance gap , rill , ring division , satellite , semimajor axis , solar nebula , solar-planetary relation , space exploration , structure , surface of celestial body , synodic period , syzygy , topography , two-body problem , volatile , volcano , water ice , water vapor |
|
FVH: added lots of planet, RT DWARF_PLANETS (2007-SEP-24) | ||||
combine either planet or planetary with other terms | ||||
planet satellite (planetSatellite) | ||||
planet satellite |
satellite | |||
plasma cloud (plasmaCloud) | ||||
plasma cloud |
cloud |
ion
, plasma jet , plasma |
||
plasma jet (plasmaJet) | ||||
plasma jet |
jet |
ion
, plasma cloud , plasma loop , plasma |
||
plasma loop (plasmaLoop) | ||||
plasma loop |
plasma jet
, plasma |
|||
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z | ||||
Description | alt | broader | narrower | related |
plasmapause (plasmapause) | ||||
plasmapause |
plasma | |||
plasma physics (plasmaPhysics) | ||||
plasma physics |
magnetohydrodynamics
, plasma |
|||
plasma (plasma) | ||||
plasma |
cosmic plasma | particle |
collisional plasma
, low-temperature plasma , relativistic plasma , solar wind , stellar wind |
H II region
, Holtsmark approximation , elementary particle , energetic particle , ionized gas , ion , plasma cloud , plasma jet , plasma loop , plasma physics , plasma wave , plasmapause , radiation belt , radiative recombination , thermodynamics , viscosity |
plasma wave (plasmaWave) | ||||
plasma wave |
ion plasma wave
, magnetohydrodynamics , plasma |
|||
platinum (platinum) | ||||
platinum (atomic number 78) |
Pt | fundamental chemical element | ||
FVH: new (2007-OCT-25) | ||||
Pluto (Pluto) | ||||
Pluto |
dwarf planet | Solar System | ||
FVH: new (2007-OCT-2) | ||||
plutonium (plutonium) | ||||
plutonium (atomic number 94) |
Pu | fundamental chemical element | ||
FVH: new (2007-OCT-25) | ||||
P magnitude (PMagnitude) | ||||
P magnitude |
apparent magnitude |
far infrared radiation
, infrared photometry |
||
Pogson scale (PogsonScale) | ||||
Pogson scale |
magnitude | |||
Poincare theorem (PoincareTheorem) | ||||
Poincare theorem |
star cluster
, stellar dynamics |
|||
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z | ||||
Description | alt | broader | narrower | related |
pointing accuracy (pointingAccuracy) | ||||
pointing accuracy |
control system
, pointing error , telescope , tracking |
|||
pointing error (pointingError) | ||||
pointing error |
control system
, pointing accuracy , telescope , tracking |
|||
point spread function (pointSpreadFunction) | ||||
point spread function |
PSF | transfer function |
atmospheric refraction
, seeing , turbulence Earth atmosphere |
|
polar axis (polarAxis) | ||||
polar axis |
celestial pole
, telescope mounting |
|||
polar cap (polarCap) | ||||
polar cap |
Earth
, planet |
|||
polar diagram (polarDiagram) | ||||
polar diagram |
antenna design
, beamwidth , radio antenna , sensitivity , sidelobe |
|||
polarimeter (polarimeter) | ||||
polarimeter |
optical instrument
, telescope instrument |
photometer
, polarimetry |
||
polarimetry (polarimetry) | ||||
polarimetry |
astronomical technique
, observing technique |
light polarization
, photometry , polarimeter |
||
polarization charge separation (polarizationChargeSeparation) | ||||
polarization [charge separation] |
magneto-optical effect |
anisotropy
, ion |
||
polarized light (polarizedLight) | ||||
polarized light |
polarised light UK |
electromagnetic radiation
, visible radiation |
light polarization | |
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z | ||||
Description | alt | broader | narrower | related |
polarized radiation (polarizedRadiation) | ||||
polarized radiation |
electromagnetic radiation
, radiation |
Faraday effect
, X-ray polarization , light polarization , stokes parameter |
||
polar motion (polarMotion) | ||||
polar motion |
motion |
Chandler wobble
, Earth rotation , latitude variation , nutation , precession |
||
polar orbit (polarOrbit) | ||||
polar orbit |
orbit | artificial satellite | ||
polar region (polarRegion) | ||||
polar region |
planet | |||
polar tide (polarTide) | ||||
polar tide |
tide | |||
pole (pole) | ||||
pole |
Galactic pole
, celestial pole , ecliptic pole , nadir , zenith |
|||
polishing (polishing) | ||||
polishing |
figuring |
lens
, mirror , optical surface |
||
pollution (pollution) | ||||
pollution |
air pollution
, light pollution , space pollution |
greenhouse effect
, site testing |
||
polonium (polonium) | ||||
polonium (atomic number 84) |
Po | fundamental chemical element | ||
FVH: new (2007-OCT-25) | ||||
polycyclic hydrocarbon (polycyclicHydrocarbon) | ||||
polycyclic hydrocarbon |
hydrocarbon | |||
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z | ||||
Description | alt | broader | narrower | related |
polytrope (polytrope) | ||||
polytrope |
model
, stellar structure |
|||
population II Cepheid (populationIiCepheid) | ||||
Population II Cepheid |
population II star |
RR Lyrae star
, W Virginis star |
||
population III star (populationIiiStar) | ||||
Population III star |
PopIII |
metal-poor star
, old star , star |
halo star |
Galactic halo
, globular star cluster , stellar population |
FVH: new (2007-SEP-21) | ||||
population II star (populationIiStar) | ||||
Population II star |
Pop II star
, PopII |
metal-poor star
, old star , star |
SX Phoenicis star
, disk population , disk star , halo star , horizontal branch star , population II Cepheid |
Galactic halo
, galactic nucleus , globular star cluster , intermediate population star , stellar population , subluminous star |
population inversion (populationInversion) | ||||
population inversion |
atomic process
, laser , maser , stimulated emission |
|||
population I star (populationIStar) | ||||
Population I star |
PopI | star |
extreme population I star
, young star |
open star cluster
, spiral arm , stellar population , young star cluster |
position angle (positionAngle) | ||||
position angle |
orbital element |
binary star
, orbit , orientation |
||
position (position) | ||||
position |
apparent position
, true position |
coordinate system
, fundamental system , reference system , spherical coordinate , standard star |
||
combine with other terms | ||||
position sensitive proportional counter (positionSensitiveProportionalCounter) | ||||
position-sensitive proportional counter |
PSPC | proportional counter | ||
FVH: new (2007-SEP-21) | ||||
positron (positron) | ||||
positron |
antiparticle
, lepton , nuclear radiation , particle |
electron
, pair annihilation , pair production , radioactivity |
||
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z | ||||
Description | alt | broader | narrower | related |
post-asymptotic giant branch (postAsymptoticGiantBranch) | ||||
post-asymptotic giant branch |
post-AGB | UU Herculis star |
Hertzsprung-Russell diagram
, asymptotic giant branch , late-type giant |
|
APM: new (2007-OCT-4) | ||||
post-main sequence star (postMainSequenceStar) | ||||
post-main sequence star |
post main sequence star |
evolved star
, non-main sequence star |
giant
, subgiant , supergiant |
|
only the broad classes are shown below; specific type will be found under these, or from the hierarchical list; excluding advanced evolution | ||||
potassium (potassium) | ||||
potassium (atomic number 19) |
K | fundamental chemical element | ||
FVH: new (2007-OCT-25) | ||||
potential energy (potentialEnergy) | ||||
potential energy |
energy | kinetic energy | ||
potential theory (potentialTheory) | ||||
potential theory |
||||
in mathematics | ||||
power (power) | ||||
power |
||||
combine with other terms | ||||
Poynting-Robertson effect (PoyntingRobertsonEffect) | ||||
Poynting-Robertson effect |
Poynting Robertson effect |
radiation pressure
, solar wind , stellar wind |
||
p process (pProcess) | ||||
p-process |
nucleosynthesis
, r-process , s-process , supernova |
|||
praseodymium (praseodymium) | ||||
praseodymium (atomic number 59) |
Pr |
fundamental chemical element
, rare earth |
||
FVH: new (2007-OCT-25) | ||||
preamplifier (preamplifier) | ||||
preamplifier |
amplifier | |||
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z | ||||
Description | alt | broader | narrower | related |
precession (precession) | ||||
precession |
Earth rotation
, astrometry , celestial mechanics , equation of the equinox , nutation , obliquity of ecliptic , polar motion , superhump |
|||
precision (precision) | ||||
precision |
limiting magnitude
, sensitivity |
|||
combine with other terms | ||||
precursor pulse (precursorPulse) | ||||
precursor pulse |
pulsar | |||
prediction (prediction) | ||||
prediction |
forecasts | |||
combine with other terms | ||||
pre-Galactic star (preGalacticStar) | ||||
pre-Galactic star |
pregalactic star | old star | ||
pre-main sequence star (preMainSequenceStar) | ||||
pre-main sequence star |
early stage star
, premainsequence star |
non-main sequence star
, young star |
Herbig-Haro object
, RW Aurigae star , T Tauri star , flash star , protostar |
T association
, orion population star , star formation |
pre-nova (preNova) | ||||
pre-nova |
prenova | progenitor | nova | |
pre-solar nebula (preSolarNebula) | ||||
pre-solar nebula |
presolar nebula | Solar System | ||
pressure broadening (pressureBroadening) | ||||
pressure broadening |
line broadening |
Doppler broadening
, Zeeman splitting , line spectrum , natural line width , spectroscopy |
||
pressure (pressure) | ||||
pressure |
Rankine-Hugoniot relation
, barometer , radiation pressure , vacuum |
|||
combine with other terms | ||||
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z | ||||
Description | alt | broader | narrower | related |
pre-supernova (preSupernova) | ||||
pre-supernova |
presupernova | progenitor | supernova | |
primary lens (primaryLens) | ||||
primary lens |
lens
, objective |
refracting telescope | ||
primary mirror (primaryMirror) | ||||
primary mirror |
mirror
, objective , telescope mirror |
reflecting telescope
, secondary mirror , tertiary mirror |
||
primary star (primaryStar) | ||||
primary star |
companion star |
secondary star
, tertiary star |
||
ES: new (2007-OCT-8) | ||||
prime focus (primeFocus) | ||||
prime focus |
focus |
Cassegrain focus
, Coude focus , Nasmyth focus |
||
primordial fireball (primordialFireball) | ||||
primordial fireball |
cosmology | Big Bang theory | ||
primordial galaxy (primordialGalaxy) | ||||
primordial galaxy |
galaxy | |||
prism (prism) | ||||
prism |
objective prism |
grism
, optical instrument , prism spectrograph , spectrum , spectrograph |
||
prism spectrograph (prismSpectrograph) | ||||
prism spectrograph |
spectrograph |
grating spectrograph
, prism |
||
profile (profile) | ||||
profile |
line profile | |||
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z | ||||
Description | alt | broader | narrower | related |
progenitor (progenitor) | ||||
progenitor |
precursors |
pre-nova
, pre-supernova |
nova
, supernova |
|
promethium (promethium) | ||||
promethium (atomic number 61) |
Pm | fundamental chemical element | ||
FVH: new (2007-OCT-25) | ||||
prominence (prominence) | ||||
prominence |
chromospheric eruption |
active prominence
, quiescent prominence |
Hanle effect
, Sun , chromosphere , flare , optical flare , solar activity , solar filament , sunspot |
|
propagation (propagation) | ||||
propagation |
||||
combine with other terms | ||||
proper motion (properMotion) | ||||
proper motion |
motion
, space motion |
Galactic rotation
, kinematics , Local Standard of Rest , moving cluster parallax , peculiar motion , photographic astrometry , radial velocity , radiant moving cluster , secular parallax , stellar dynamics , stellar motion , transverse velocity |
||
property (property) | ||||
property |
magnetic property
, mechanical property , optical property , surface property , thermal property |
|||
combine with other terms | ||||
proportional counter (proportionalCounter) | ||||
proportional counter |
measuring instrument | position sensitive proportional counter | X-ray detector | |
FVH: added NT POSITION_SENSITIVE_PROPORTIONAL_COUNTERS (2007-SEP-21) | ||||
protactinium (protactinium) | ||||
protactinium (atomic number 91) |
Pa | fundamental chemical element | ||
FVH: new (2007-OCT-25) | ||||
protocluster (protocluster) | ||||
protocluster |
cluster |
collapsing cloud
, cosmogony , cosmology , galaxy cluster , star cluster |
||
protogalaxy (protogalaxy) | ||||
protogalaxy |
galaxy
, gaseous sphere |
collapsing cloud
, cosmogony , cosmology |
||
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z | ||||
Description | alt | broader | narrower | related |
proton (proton) | ||||
proton |
elementary particle
, fundamental particle , particle |
alpha particle
, antiproton , nucleus atom |
||
proton-proton reaction (protonProtonReaction) | ||||
proton-proton reaction |
proton proton cycle
, proton proton reaction , proton-proton cycle |
hydrogen burning |
carbon nitrogen cycle
, nuclear fusion , stellar interior |
|
protoplanetary nebula (protoplanetaryNebula) | ||||
protoplanetary nebula |
proplyds | collapsing cloud |
cosmogony
, protoplanet , solar nebula |
|
FVH: added ALT proplyd (2007-SEP-21) | ||||
protoplanet (protoplanet) | ||||
protoplanet |
Solar System
, planetesimal , planet , protoplanetary nebula , satellite , solar nebula |
|||
protostar (protostar) | ||||
protostar |
gaseous sphere
, pre-main sequence star |
Bok globule
, Herbig-Haro object , T Tauri star , birth rate , collapsing cloud , cometary globule , star formation , stellar evolution |
||
pulsar (pulsar) | ||||
pulsar |
collapsed star
, degenerate star , evolved star , radio source , relativistic star |
X-ray pulsar
, binary pulsar , optical pulsar , radio pulsar |
frequency shift
, glitch , neutron star , precursor pulse , pulse duration , pulse energy , pulse intensity , pulse profile , pulse structure , pulse width , pulse window , rapid oscillation , supernova remnant , supernova |
|
pulsating variable star (pulsatingVariableStar) | ||||
pulsating variable star |
intrinsic variable star
, variable star |
53 Persei star
, BL Herculis star , Cepheid , Mira variable star , RR Lyrae star , RV Tauri star , S Vulpeculae star , SX Phoenicis star , W Virginis star , ZZ Ceti star , beta Cephei star , delta delphini star , delta Scuti star , double-mode Cepheid , double-mode variable star , dwarf Cepheid , irregular variable star , lambda eridani star , long period variable star , multi-periodic variable star , periodic variable star , semi-regular variable star |
He II ionization zone
, asteroseismology , double-mode pulsation , kappa mechanism , multi-periodic pulsation , non-radial pulsation , overtone mode , period , period change , period-color relation , period-density relation , period-luminosity-color relation , period-luminosity relation , period-mass relation , period-radius relation , period-spectrum relation , pulsation mode , pulsation theory |
|
pulsation mode (pulsationMode) | ||||
pulsation mode |
fundamental mode
, overtone mode |
multi-periodic pulsation
, multi-periodic variable star , non-radial pulsation , period , pulsating variable star , pulsation theory , pulsation |
||
pulsation (pulsation) | ||||
pulsation |
amplitude
, asteroseismology , pulsation mode |
|||
combine with other terms | ||||
pulsation theory (pulsationTheory) | ||||
pulsation theory |
He II ionization zone
, pulsating variable star , pulsation mode |
|||
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z | ||||
Description | alt | broader | narrower | related |
pulse counter (pulseCounter) | ||||
pulse counter |
amplifier
, pulse |
|||
pulse counting (pulseCounting) | ||||
pulse counting |
amplifier
, pulse |
|||
pulse duration (pulseDuration) | ||||
pulse duration |
pulsar
, pulse |
|||
pulse energy (pulseEnergy) | ||||
pulse energy |
pulsar
, pulse |
|||
pulse intensity (pulseIntensity) | ||||
pulse intensity |
pulsar
, pulse |
|||
pulse profile (pulseProfile) | ||||
pulse profile |
pulsar
, pulse |
|||
pulse (pulse) | ||||
pulse |
pulse counter
, pulse counting , pulse duration , pulse energy , pulse intensity , pulse profile , pulse structure , pulse width , pulse window |
|||
combine with other terms | ||||
pulse structure (pulseStructure) | ||||
pulse structure |
pulsar
, pulse |
|||
pulse width (pulseWidth) | ||||
pulse width |
pulsar
, pulse |
|||
pulse window (pulseWindow) | ||||
pulse window |
pulsar
, pulse |
|||
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z | ||||
Description | alt | broader | narrower | related |
Purkinje effect (PurkinjeEffect) | ||||
Purkinje effect |
photometry
, variable star , visual magnitude , visual observation |
|||