User:Hftf/Books/Astro/P

P

 * Pair-instability supernova
 * Parallax
 * Parsec
 * Perihelion
 * Physical cosmology
 * Planck's law
 * Planetary nebulae
 * Pleiades (star cluster)
 * Polar jet
 * Pre-main-sequence star
 * Proper length
 * Proper motion
 * Protoplanetary disk
 * Protostar
 * Pulsar