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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