Astronomy
Articles about stars, planets, space and the universe.
Phoenix (constellation)
Phoenix (spacecraft)
Phoenix Dwarf
Phoenix Dwarf — a Local Group dwarf galaxy
Photosphere
Photosphere — the light-emitting layer of a star
Physical cosmology
Pi1 Gruis
Pictor
Pioneer 10
Pioneer 10: NASA's first probe to Jupiter and the outer Solar System
Pioneer 11
Pioneer program
Pioneer program (NASA unmanned probes, 1958–1978)
Pisces (astrology)
Pisces (constellation)
Piscis Austrinus
Piscis Austrinus (Southern Fish) — constellation overview
Pistol Star
Pistol Star — a luminous blue hypergiant near the Galactic center
Planck (spacecraft)
Planck epoch
Planet
A planet is a large body that orbits a star, shaped by its own gravity into a rounded form. Planets occur in our Solar System and around other stars and vary widely in composition,
Planetarium
Planetarium: domes, projection systems, uses and terminology
Planetary nebula
Planetary ring
Planetary science
Planetary science: study of planets, their systems, and processes
Planetary system
Planetary system: structure, discovery, and significance
Planetesimal
Planets beyond Neptune
Planetshine
Planetshine — illumination of a moon by light reflected from its planet
Pleiades
Plutino
Plutino (2:3 resonant Kuiper belt object)
Pluto
Plutoid
Polaris (star)
Polaris — the North Star: identity, system, history and navigational role
Pollux (star)
Polydeuces (moon)
Polydeuces — Trojan moon of Saturn
Portia (moon)
Portia — inner moon of Uranus
Praxidike (moon)
Procyon
Prometheus (moon)
Prometheus (moon of Saturn)
Proper motion
Prospero (moon)
Prospero — an irregular retrograde moon of Uranus
Proteus (moon)
Protostar
Provisional designation in astronomy
Proxima Centauri
Psamathe (moon)
Psamathe — an irregular moon of Neptune
PSR B1257+12 B
Puck (moon)
Pulsar
Puppis
Puppis — the Stern of the Ship Argo