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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
Hα
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