Living World

The concept of Living Worlds is incredibly prevalent in science fiction and fantasy, generally speaking these worlds are sapient but its not necessarily true.

Moons

 * Doctor Moon
 * Erythro (Isaac Asimov's Nemesis)
 * Id the Selfish Moon
 * Pandora (Avatar)

Planets

 * Acheron
 * Alcoreth (The Menace from Andromeda)
 * Alyx (The Lonely Planet)
 * Chiron (Sid Meier's Alpha Centauri)
 * Primus/Cybertron
 * Dahak (David Weber's Mutineers Moon)
 * Earth (When The World Screamed)
 * Ego the Living Planet
 * Evil (Fifth Element)
 * Eylor (Rifts)
 * Fairy (Sentō Yōsei Yukikaze)
 * First Sirian Bank (The Dark Side of the Sun)
 * G889 (Earth 2)
 * Gaea (Gaea Trilogy)
 * Gaia (Foundation's Edge)
 * Ghroth (Cthulhu Mythos)
 * Gozmastar (Dengeki Sentai Changeman)
 * House (Doctor Who)
 * Kathulos
 * The Krang (The Tar-Aiym Krang)
 * Mogo
 * Pandarve (Storm Comics)
 * Petaybee
 * Phaaze
 * Planet (Sid Meier's Alpha Centauri)
 * Primus
 * Planet Remina (Hellstar Remina)
 * Scub Coral (Eureka Seven)
 * Solaris
 * Thallon
 * Triton (Triton is a Planet's Name)
 * Unicron
 * Worm Planet (The Power Twins)
 * Wormwood (Rifts)
 * Yggardis the Sorcerer Planet
 * Zonama Sekot

Stars

 * Fannie Mae
 * Torajii

Others

 * Various worlds spread across the galaxy in Alastair Reynolds's Revelation Space universe are inhabited by Pattern Jugglers, networks of marine organisms which serve as vast information-cataloging systems, recording the minds of various star-faring races which have visited the planets. It is unclear to what extent Juggler worlds are independently sentient.