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
Descriptionaltbroadernarrowerrelated
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
Descriptionaltbroadernarrowerrelated
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
Descriptionaltbroadernarrowerrelated
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
Descriptionaltbroadernarrowerrelated
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
Descriptionaltbroadernarrowerrelated
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
Descriptionaltbroadernarrowerrelated
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
Descriptionaltbroadernarrowerrelated
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
Descriptionaltbroadernarrowerrelated
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
Descriptionaltbroadernarrowerrelated
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
Descriptionaltbroadernarrowerrelated
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
Descriptionaltbroadernarrowerrelated
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
Descriptionaltbroadernarrowerrelated
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
Descriptionaltbroadernarrowerrelated
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
Descriptionaltbroadernarrowerrelated
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
Descriptionaltbroadernarrowerrelated
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
Descriptionaltbroadernarrowerrelated
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
Descriptionaltbroadernarrowerrelated
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
Descriptionaltbroadernarrowerrelated
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
Descriptionaltbroadernarrowerrelated
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
Descriptionaltbroadernarrowerrelated
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
Descriptionaltbroadernarrowerrelated
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
Descriptionaltbroadernarrowerrelated
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
Descriptionaltbroadernarrowerrelated
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
Descriptionaltbroadernarrowerrelated
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
Descriptionaltbroadernarrowerrelated
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
Descriptionaltbroadernarrowerrelated
Purkinje effect      (PurkinjeEffect)
Purkinje effect
photometry ,
variable star ,
visual magnitude ,
visual observation
 

Thu Jul 3 16:30:01 2008