Gaia can refer to any one of the following:

• Gaia (mythology), a Greek and Roman goddess, also known as the Earth Mother (alternate spellings: Gaya, Gæa, Gaea, Gaïa, Gaya, or Ge)
• Gaia theory (science), a group of scientific theories about how life on Earth may regulate the planet's biosphere to make it more hospitable to life
• Gaia philosophy, a set of philosophical views based on Gaia theory and the concept of a "living planet"
• Gaia Movement, an international network of activist organisations and groups that draw inspiration from Lovelock's Gaia theory

Fiction:

• Gaia (Asimov), a fictional planet in Isaac Asimov's Foundation Series and where all animals, plants, and even inanimate matter are telepathically connected, forming a single sentient planet-wide entity
• Gaea Trilogy, a trilogy of science fiction novels by John Varley
• Gaia Gear, a science-fiction novel written by Yoshiyuki Tomino, based on the Gundam metaseries
• ZGMF-X88S Gaia Gundam, a fictional weapon from the Cosmic Era of the anime Gundam metaseries
• Gaia (comics), a fictional comic book character in the Marvel Universe (an alien mutant and former member of Generation X)
• Gaea (comics), a fictional comic book character in the Marvel Universe (Goddess of the Earth)
• Gaia, Rogue Champion, a character in the PlayStation game Battle Arena Toshinden
• Illusion of Gaia, the second title in the Soul Blazer series of video games for the Super Nintendo Entertainment System
• Gaia is also the name of the planet in a few different Final Fantasy games, and in the movie The Spirits Within
• Gaia (DC comics), a goddess from DC's Green Lantern comics
• Gaia (My Gaia), a shojo-ai manga comic by chuu
• Gaea (Escaflowne), the fictional planet where the anime The Vision of Escaflowne takes place

Astronomy:

• Gaia probe, a space astronomy mission due for launch in 2011 by the European Space Agency
• Gaea crater, a crater on Amalthea (Jupiter's third moon)

Music:

• Gaia is a pseudonym of the DJ Armin Van Buuren
• Gaia (album), an album by Mägo de Oz
• Gaia (song), a song by The Devin Townsend Band
• Gaia (Swedish band), a Swedish alternative heavy-rock band
• Gaia (British band), a Yorkshire (Barnsley) rock band
• Gaya (band), an Israeli band

Places:

• La Fountae de Gaia, in the center of the main Piazza of Siena, around which the traditional horse-race, the Palio, runs every summer.
• Vila Nova de Gaia, a city in Portugal
• GAIA, the acronym for the Grantley Adams International Airport located in Barbados
• Gaia is the spirit of Earth in Captain Planet, animated series
• Gaia Trafikk is the largest public transport company in Bergen, Norway
• Gaià, a river in Catalonia, Spain

Gaia may also refer to:

• Gaia Online, an Internet forum
• Gaia (chess), a chess engine or computer program that can play chess

See also

• Gaya (disambiguation)

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