- PA-99-N2
- PA-99-N2 b
- PGC 3589
- PGC 69293
- PSO J318.5-22
- PSR B1257+12
- PSR B1257+12 A
- PSR B1257+12 B
- PSR B1257+12 C
- PSR B1257+12 D (Dragon)
- PSR B1620-26
- PSR B1620-26 b
- PSR B1919+21
- Pallas
- Parsec
- Perseverance
- Phobos
- Phoebe
- Phoebe Ring
- Pi Mensae
- Pi Mensae b
- Pi Mensae c
- Pistol Star
- Planet
- Planet Nine
- Planets in the Solar System
- Pluto
- Principal Galaxies Catalogue
- Procyon A
- Protoplanet
- Proxima Centauri
- Proxima Centauri b
- Proxima Centauri c
- Proxima Centauri d
- Pulsar
- Pulsar planet
- PxP-4
- Quasar
- Quasi-satellite
- Quintillion tower
- RX J1131-1231
- R Puppis
- R Sculptoris
- Red dwarf
- Red hypergiants
- Red supergiant
- Retrograde motion
- Rhea
- Rigel
- Ring galaxy
- Ring system
- Rings of Rhea
- Rings of Saturn
- Rogue planet
- Ross 128
- Ross 128 b
- Ross 154
- Rukbat
- SMACS J0723.3–7327
- SN 185
- SN 1993J
- SWEEPS-01
- SWEEPS-02
- SWEEPS-03
- SWEEPS-04
- SWEEPS-05
- SWEEPS-06
- SWEEPS-07
- SWEEPS-08
- SWEEPS-09
- SWEEPS-10
- SWEEPS-11
- SWEEPS-12
- SWEEPS-13
- SWEEPS-14
- SWEEPS-15
- SWEEPS-16
- SWEEPS J175853.29-291233.5
- SWEEPS J175853.38-291217.8
- SWEEPS J175853.57-291144.1
- SWEEPS J175853.92-291120.6
- SWEEPS J175854.60-291128.2
- SWEEPS J175857.29-291253.4
- SWEEPS J175857.69-291114.5
- SWEEPS J175859.24-291328.7
- SWEEPS J175859.60-291211.8
- SWEEPS J175902.00-291323.7
- SWEEPS J175902.67-291153.5
- SWEEPS J175904.44-291317.1
- SWEEPS J175905.95-291305.6
- SWEEPS J175907.56-291039.8
- SWEEPS J175907.64-291023.7
- SWEEPS J175908.44-291140.6
- S Cephei
- Sagittarius
- Sagittarius Star Cloud
- Sagittarius Window Eclipsing Extrasolar Planet Search
- Satellite Galaxy
- Saturn
- Scott S. Sheppard
- Sculptor
- Sculptor Galaxy
- Sedna
- Sigma Draconis
- Sirius
- Small Dark Spot
- Solar System
- Space probe
- Spiral galaxy
- Star
- Star cluster
- Stephenson 2-18
- Styx
- Sub-brown dwarf
- Submoon
- Sudarsky's gas giant classification
- Sun
- Super-Earth
- Super-Jupiter
- Superhabitable planet
- Synodic day
- TOI 700
- TOI 700d
- TRAPPIST-1
- TRAPPIST-1b
- TRAPPIST-1c
- TRAPPIST-1d
- TRAPPIST-1e
- TRAPPIST-1f
- TRAPPIST-1g
- TRAPPIST-1h
- TYC 9486-927-1
- T Tauri star
- Tau Ceti
- Teegarden b
- Teide 1
- Terrestrial planet
- The Scooter
- Thebe
- Theia
- Thyone
- Tidal locking
- Tidally detached exomoon
- Titan
- TrES-2b
- Trans-Neptunian object
- Transit Method
- Transiting Exoplanet Survey Satellite
- Triangulum Galaxy
- Triton
- Trojan (celestial body)
- Trojan planet
- Twin Quasar
- UGC 10310
- ULAS J1342+0928
- UY Scuti
- Unbarred spiral galaxy
- Uranus
- Uranus-Crossing Minor Planet
- V1400 Centauri
- V774104
- V830 Tauri
- V830 Tauri b
- VY Canis Majoris
- Vega
- Venus
- Venus snow
- Vesta
- Virgo
- Voyager 1
- Voyager 2
- Vulcan (Hypothetical Planet)
- WASP-100
- WASP-100 b
- WASP-101
- WASP-101 b
- WASP-39
- WASP-39 b
- WASP-65
- WASP-65 b
- WASP-75
- WASP-75 b
- WASP-76
- WASP-76 b
- WASP-82
- WASP-82 b
- WASP-84
- WASP-84 b
- WASP-90
- WASP-90 b
- WASP-95
- WASP-95 b
- WASP-96
- WASP-96 b
- WASP-97
- WASP-97 b
- WASP-98
- WASP-98 b
- WASP-99
- WASP-99 b
- WISE 0855-0714
- WOH G64
- Whirlpool Galaxy
- White dwarf
- William Herschel
- Wolf 359 b
- Wolf 359 c
- Z8 GND 5296
- ZTF J1901+1458
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