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2581 "P"

pacce
Cerro Pachon observatory
Publication of the Astronomical Society of the Pacific
Pac-
support pad
solar paddle
electron pair
star pair method
pair of movable wires
pair production
Palomar observatory
Palomar observatory sky survey
panchromatic
panchromatic emulsion
control panel
Panoptic eyepiece
panoramic receiver
recording paper
paper base
paper developer
fixed parabola
parabola corrector
parabolic
parabolic antenna
parabolic cylinder
parabolic mirror
parabolic orbit
parabolic primary
steerable parabolic reflector
parabolic (reflector) antenna
parabolic (reflector) radio telescope
parabolic telescope
parabolic velocity
steerable paraboloid
paraboloid(al) reflector
paraboloid bowl
paraboloid dish
paraboloid mirror
paraboloid radio telescope
cylindrical paraboloid reflector
paraboloid (reflector) antenna
Zeeliger's paradox
cosmological paradoxes
parahelium
parahydrogen
parallactic
parallactic angle
parallactic component
parallactic displacement
parallactic ellipse
parallactic error
parallactic head
parallactic inequality
parallactic libration
parallactic motion
parallactic mounting
parallactic shift
parallactic triangle
trigonometrical parallax
trigonometric parallax determination
trigonometric series of parallaxes
parallax factor
parallax in azimuth
parallax in declination
parallax in right ascension
parallax in zenith distance
parallax plates
parallax program(me)
parallax series
parallax star
parallax work
parallel
parallel band
parallel beam
parallel light
parallel vibration
paramagnetic resonance
induced paramagnetism
Hubble's parameter
Stokes' parameters
parametric
varactor (diode) parametric amplifier
Chandrasekhar's parametric equations of state
paramodification
Cerro Paranal observatory
parasitic antenna
parasitic image
paraxial rays
fractional parentage
parentage of spectral terms
parent comet
parent nucleus
parent term
parfocal eyepieces
parhelia
parhelion
parity
parity effect
parity rule
Parkes radio telescope
cubic parsec
moving parsecs
partial eclipse
partial exposure
partial filling
partially-filled aperture
partially polarized
partial phase
partial polarization
spiraling particle
charged particle counter
particle flux
particle loss
Particle Physics and Astronomy Research Council
β particles
particle scattering
particular act
vibrational partition function
partly filled aperture
Paschen-Back effect
Paschen continuum
Paschen limit
Paschen series
Pashen-Runge mounting
receiver band pass
time of perihelion passage
passage of meteor
passage through potential barrier
pass band
passband
passenger elevator
low pass filter
isoplanatic patch
air path
apparent path of the Moon
solar patrol
field pattern
pattern lobes
Pauli's exclusion principle
payload
payload weight
pa
pa
"pa"
pa
paea
P-branch
pc
P Cygni
P Cygni line profile
subsidiary peak
peak electron density
peak intensity
Sacramento peak observatory
peak radio emission intensity
peculiar
peculiar galaxy
peculiarity
peculiar motion
peculiar motion component
peculiar nebula
peculiar object
peculiar spectrum
peculiar star
peculiar velocity
Peltier cooler
pen(-and-ink) recorder
incident pencil
pencil beam
pencil-beam (aerial) system
pencil-beam antenna
pencil beam instrument
pencil beam interferometer
pencil beam scan
pencil of radiation
conical pendulum
pendulum clock
penetrating coefficient
penetrating component
penetrating orbit
penetration depth
pentad
pentag
penta-prism
spot penumbra
penumbral eclipse
per annum
per century
color perception
per day
perfect cosmological principle
perfect diffuser
perfect emitter
perfect gas
perfect gas law
perfect scattering
perfect seeing
theoretical performance
radio performances
per hour
periastron
perigee
perigee distance
perihelia
perihelic distance
argument of perihelion
perihelion distance
time of perihelion passage
motion of perihelion (point)
perihelion speed
periheliutn
lines per inch
synodic rotation period
long period comet
periodic chart
periodic comet
periodic error correction
periodic errors
periodicity period
periodic motion
periodic perturbation
periodic system of elements
periodic table
periodic variables
periodic variable stars
period-luminosity diagram
period-luminosity law
period-luminosity relation
period of overlap of two cycles
synodic period of rotation at the equator
period of solar rotation
period of variation
periodogram
period per second
peripheral vision
permanent current
permanent
permanent satellite
magnetic permeability
permeability of space
per minute
permitted line
permittivity of space
perpendicular antennas
perpendicular band
perpendicular vibration
per second
persistent lines
personal equation
personal error
perturb
perturbance
vibrational perturbation
perturbation method
stellar perturbations
wave-mechanical perturbation theory
perturbative effect
perturbative function
perturbed orbit
relativistic perturbing force
electron density per unit length
per year
p-fold symmetric axis
Pfund series
phantom telescope
phantom telescope computer
pharos
gibbous phase
phase angle
range of phase angles
sudden phase anomaly
phase changer
phase changing unit
phase coefficient
phase coherent mechanism
monthly phase cycle
phased array
Rayleigh's phase function
phase grating
phase integral
phase matrix
flash phase of flare
phase of planet
maximum phase of solar cycle
phase of the Moon
phase plate
phase reversing switch
phase rotator
phase rule
phase sensitive detector
phase-sensitive detector
phase-sensitive rectifier
phase shifter
phase-shift method
phases of Venus
phase space
phase spectrum
phase switched interferometer
phase-switched interferometer
phase switching
phase-switching interferometer
phase-switching method
phase-switching principle
phase-switching receiver
phase-switching technique
phase-switching unit
phase variation
phase velocity
phenidone developer
terrestrial phenomena
seeing phenomenon
phonon
potassium dihydrogen phosphat
phoswich detector
phot
photo
photoactivate
photoactive
photoamplifier
photo-cathode
opaque photocathode
vacuum photocell
photocell box
photochromy
photochronograph
photoconducting cell
photoconduction
photoconductive
photoconductive cell
photoconductive effect
photoconductivity
photoconductor
photocurrent
photocurrent noise
photodetachment
photodetector
avalanche photo-diode
p-i-n photodiode
photodisintegration
photodissociation
outer photoeffect
photoelectric
photoelectric absorption
photoelectric bisecting device
photoelectric cathode
photoelectric cell
photoelectric colorimeter
photoelectric current
photoelectric detector
photoelectric disintegration
photoelectric effect
photoelectric emission
photoelectric fatigue
photoelectric guider
photoelectric guiding
photoelectric guiding device
photoelectricity
photoelectric magnitude
photoelectric means
photoelectric measurements
photoelectric measuring engine
photoelectric methods
photoelectric micrometer
photoelectric microphotometer
photoelectric photometer
photoelectric photometry
photoelectric receiver
photoelectric record
photoelectric registration of star transit
photoelectric sensitivity
photoelectric star photometer
photoelectric techniques
photoelectric transit instrument
photoelectric work
photoelectron
photoemission
photoemissive cathode
photoemissive cell
photoemissive effect
photoemissive element
photoexcitation
pseudo photograph
photographic
photographic absorption coefficient
photographically
photographic astrometry
photographic atlas
photographic camera
photographic catalogue
photographic contrast enhancement
photographic density
photographic determination
photographic developer
photographic effect
photographic efficiency
photographic emulsion
photographic equatorial
very long photographic exposure
photographic exposure meter
photographic failure
photographic field of view
photographic film
photographic glass
photographic illumination
photographic image
photographic image formation
photographic light
photographic magnitude
photographic material
photographic meteor
photographic method
photographic microscope
photographic objective
photographic observations
photographic paper
photographic photometer
photographic photometry
photographic plate
photographic plate carriage
photographic proper motions
photographic-ray picture
photographic reciprocity law failure
photographic recording
photographic refractor
photographic registration
photographic resolving power
photographic sensitivity
photographic speed
photographic star position
photographic survey
photographic techniques
photographic telescope
photographic tracking
photographic trail
photographic transit circle
photographic vertical circle
photographic work
photographic zenith tube
duplicate photographs
stellar photography
photoheliogram
photoheliograph
photoionization
two star photometer
photometer head
photometer, multi-channel
photometer, two star
photometric
photometric absolute magnitude
photometrically clear night
photometric(al) paradox
photometric atlas
photometric bench
photometric center correction
photometric double star
photometric measurements
photometric methods
photometric observations
photometric parallax
photometric quantity
photometric scale
photometric skyies
photometric studies
uvby photometric system
photometric telescope
photometric wedge
photometric work
wide band photometry
solar blind photomultiplier
photomultiplier cell
photomultiplier tube
resonance photon
photon counter
photon counting
photon-counting equipment
image photon counting system
photon noise
photon-recording efficiency
photopic vision
photoplate
apparent photored magnitude
photoresistance
photoresistance cell
photoretrogression
photosensitive
photosensitivity
turbulence spectrum of photosphere
photospheric
photospheric F
photospheric facula
photospheric granulation
photospheric granules
photospheric light
photospheric model
photospheric radiation
photospheric radius
undisturbed photospheric region
photospheric spectrum
photospheric surface
photospheric telescope
photospheric temperature
active photospherlc region
photosurface
multiplier phototube
photovalve
photovisual absorption coefficient
photovisual magnitude
photovoltaic cell
physical area
physical binary star
physical characteristics
physical conditions
physical constants
physical development
physical dimension
physical double star
physical libration
physical photometer
physical photometry
physical resolving power
physical variable
physical variable star
solar physicist
terrestrial physics
Particle Physics and Astronomy Research Council
π-bond
Pic du Midi observatory
Pickering lines
Pickering series
pick-off
piezoelectric pickup
picture (pickup) device
pick-up tube
X-ray picture
picture camera
picture element
picture monitor
two-dimensional picture of the Sun
picture pattern
picture (pickup) device
motion pictures
picture signal monitor
pier
piezoelectric pickup
piggy-back mounting
pigment cell F
pillow distortion
pinch effect
pinch-effect
pin cushion distortion
illuminated pinhole
pin-hole camera
rack and pinion focuser
p-i-n photodiode
p-i-n
pion
pip
π-polarization
crater pit
pitch angle
pitch lap
pivot
investigation of shape of pivots
pivot supports
pixel
π-
π-
π-
reduction from apparent place to mean place
true place at date
to place into orbit
fundamental places
reduction from apparent place to mean place
radio plage
plage area
calcium plage areas
radio plage component
plage emission
plage faculaire
plage radiation
plage region
lunar plain
plain hypo bath
planar molecule
planar symmetric top
Planckian radiator
Planck intensity
Planck's constant
Planck's law
Planck's radiation law
uv plane
plane grating
plane of aperture
plane of ecliptic
plane of symmetry
plane of the Milky Way
plane of zodiac
plane-parallel
plane-parallel atmosphere
plane-parallel corrector
plane-parallel plate
plane-parallel plate of glass
plane-parallel slabs
plane polarization
plane polarized
plane subsystem
disk temperature of planet
planetarium
planetarium program
planetary
planetary aberration
planetary astronomy
planetary atmosphere
planetary conditions
planetary emission
planetary ephemerides
planetary filter
planetary image
planetary interior
planetary magnetic Kp-index
planetary material
laws of planetary motion
planetary movement
planetary n
planetary nebula
planetary observations
planetary orbit
planetary perturbations
planetary precession
planetary probe
planetary radar
planetary radiation
planetary radiation level
planetary radio astronomy
planetary rotation
Planetary Society
planetary spectrograph
planetary speed
planetary surface
planetary system
planetary telescope
planetary temperature
planetary theory
minor planet belt
Minor planet center
planet echo
planet equator
planetesimals
planetocentric
planetographic
planetoid
planetology
system of planets
planet's ionosphere
planet's orbit
planet's rotation
plane wave
plane wave front
planisphere
Max Plank institutes
planned trajectory
plano-concave lens
plano-convex lens
stellar plasma
plasma cloud
plasma disturbance
plasma frequency
plasma hypothesis
plasma oscillation
solar plasma probe
plasma radiation
plasma waves
plasmon
La Plata observatory
wave plate
plate carriage
plate center
method of plate constants
plate development
plate drive
plate drive arm
plate-drive gearing
plate-drive motor
plate holder
prime-focus plateholder
plate inclination
plate measurement
plate-measuring device
plate-measuring engine
plate measuring machine
plane-parallel plate of glass
supernovae of plates
plate scale
Poncet platform
Platonic year
Plossl eyepiece
super Plossl' eyepiece
polar plot
plug
plume
polar coronal plumes
Pluton's orbit
Pockel's cell
Pogson's equation
Pogson step method
motion of perihelion (point)
half power point
point brilliance
point group
point image
pointing
pointing accuracy
pointing error
pointing instrument
point mass
Apache point observatory
first point of Aries
near point of clear vision
first point of Libra
compass points
point source
point-source model
point spread function
point-to-point extrapolation
Poisson brackets
Poisson distribution
flattening, polar
polar axis
upper polar(-axis) bearing
polar(-axis) bearings
polar-axis shaft
polar-axis worm
polar axle
polar belt
polar blackout
south polar cap
polar cap absorption
polar cap blackout
polar compression
polar coronal plumes
polar crown of filaments
polar diagram
polar diameter
north polar distance
polar facula
polar flattening
radio polarimeter
polarimetry
state of polarisation
polariser
polarising filter
Polaris instrument
Polaris seeing monitor
Polaris telescope
opposite polarities separating line
reversal of magnetic polarity
polarizability
polarizability ellipsoid
polarizability tensor
plane polarization
polarization effect
polarization foil
polarization interference filter
polarization interferometer
polarization measurements
polarization observations
polarization of continuum
polarization of core
polarization of lines
polarization of starlight
polarization photometer
polarization potential
polarization ratio
polarize
randomly polarized
polarized antenna
elliptically polarized beam
polarized burst
polarized component
polarized light
linearly polarized radiation
polarized radio waves
polarized ray
wire grid polarizer
polarizing apparatus
polarizing eyepiece
polarizing interferometer
polarizing monochromator
polarizing prism
polar light
polar map
polar molecule
polar motion
Polaroid
Polaroid sheet
polar orbit
polar period
polar plot
polar plumes
polar prominence
polar radius
polar rays
polar region
polar sensitive
polar sequence
north polar spur
polar streamers
polar telescope
polar tube
polar wandering
polar zone
ecliptic pole
pole effect
pole of ecliptic
pole of equator
terrestrial poles
poleward migration of prominences
polish
polisher
optical polishing
polishing machine
polishing tool
politropic form
politropic index
light pollution
light pollution rejection filter
polyad
polyatomic molecule
black polyethylene
polymonochromator
Jacobi polynomial
polytropic core
polytropic model
Poncet platform
lava pool
seeing poor
poorly directive antenna
poor resolving power
very poor seeing
I population
population density
population I
population II
population II object
population II star
population index
population I object
population I star
population of levels
II (population) stars
porous material
Porro prism
portable meridian circle
Porter mount
Porter's solar disks
straight line portion
prediction of position
positional accuracy
positional astronomy
positional correction
positional data
positional information
positional measurements
positional work
position angle
position angle effect
position circle
position determination
position-indicating equipment
position line
radio position measurement
position-measuring devices
position micrometer
position of telescope
position sensitive proportional counter
positive
positive branch
positive cosmological constant
positive direction
positive drift
positive eyepiece
positive image
positive lens
positive level
positive rotational level
posit(r)on
possible error
post exposure
post-limb event
post-limb flare
potassium dihydrogen phosphat
polarization potential
passage through potential barrier
repulsive potential curve
potential curve diagram
potential energy
potential function
potentiometer
potentiometer setting
potted photomultiplier
power
power distribution
ratio of radio to optical power emitted
zero power finder
power flux
powerful radio source
powerful telescope
total power instrument
receiver noise (power) level
total power method
total power output
half power point
power radiated by source
total power receiver
power-sensitivity diagram
power-sensitivity pattern
power source
power spectrum
power supply
Poynting's vector
PP'-multiplet
practical astronomy
practical astrophysics
practical efficiency
practicing astronomer
pre-amplifier
preamplifier
preceding
preceding spot
precess
planetary precession
precessional
precessional motion
precession correction
precession in longitude
precession in obliquity
precession of angular momentum
precession of equinoxes
precession of the equinoxes
precipitation
precise determination
optical precision
precision reflector
precision worm-and-worm wheel
predicted place
predicted position
orbit prediction
prediction of position
inverse predissociation
predissociation limit
preexposure
preferential absorption
preferential power
preflare
pre-ionization
preloaded ball bearing
pre-nova spectrum
digital data presentation
present-day astronomy
total pressure
Lorentz theory of pressure broadening
pressure distribution
pressure gradient
pressure-induced band
pressure-induced spectrum
pressure ionization
pressure of sunlight
pressure shift
pressure variation
prestellar
Preston law
pretelescopic astronomy
previous exposure
auroral primaries
parabolic primary
primary aberration
primary antennas
primary beam
primary color
primary cosmic radiation
primary cosmic ray
primary cosmic ray experiment
primary cosmic rays
primary eclipse
primary feed
primary focal ratio
primary horn
primary image
primary minimum
primary mirror
primary mirror cell
primary paraboloid
auroral primary particles
primary star
prime focus
prime-focus cage
prime-focus cell
prime-focus elevator
prime-focus housing
prime-focus optical assembly
prime-focus plateholder
prime-focus position
prime focus system
prime meridian
prime observing position
prime vertical
principal axis
principal focus
principal line
principal lobe
principal mirror
principal plane
principal quantum number
principal series
principal source of decameter activity
uncertainty principle
principle of equivalence
principle of exclusion
principle of Fermat
principle of invariance
principle of reciprocity
principle of similarity
contact print
digit printer
printing
printing exposure
Rochon prism
prism angle
prismatic
prismatic astrolabe
prismatic eyepiece
prismatic image
prism(atic) spectroscope
prismatic spectrum
prism spectrograph
transition probability
Einstein probability coefficient
probability density distribution
probability distribution
probable ellipse
probable error
probable error area
Venus probe
inverse problem
astrophysical problems
procedure
observational procedures
thermal process
secondary processes
image processing
to process the observational data
pair production
energy production in stars
electron production rate
productivity
product of inertia