pola - prem
- polar axis
- polar caps
- polar diagram
- polar motion
- polar orbits
- polar regions
- polar tides
- polar wandering
- polarimeters
- polarimetry
- polarization
- polarized light
- polarized radiation
- polars
- poles
- polishing
- pollution
- polycyclic hydrocarbon
- polytropes
- population I stars
- population II cepheids
- population II stars
- population inversion
- position angle
- positional astronomy
- positions
- positrons
- postmainsequence stars
- potential energy
- potential theory
- power
- Poynting Robertson effect
- preamplifiers
- precession
- precision
- precursor pulse
- precursors
- predictions
