Gaia can mean:
- Gaia (mythology): the earth and mother of the gods in Greek mythology
- Gaia (spacecraft): European space mission to collect data on Milky Way stars and other objects
- Gaia hypothesis: the idea that living things and the Earth are closely connected, and form a complex self-regulating system, making sure there can be life on the planet. James Lovelock promoted this idea.
- Gaia (Abrahamic religion): the Deity of the medieval faith Deanism from Celtic England (Europe)
| This disambiguation page lists articles associated with the title Gaia.
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