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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