Terraforming was a form of planetary engineering in which a planet or moon was modified through artificial means to match the atmosphere, temperature and ecology of a Class M world to make it more habitable for humanoid life.

Orions terraformed their own homeworld of Botchok (Rigel VIII) following the Atom War and the Long Winter, in a project known as the First Stage. It was not a quality effort, and records of the project were fragmented. The rebuilt ecology of Botchok was not entirely successful, as the planet's terraforming required continual re-adjustment into modern times, but the planet almost entirely recovered. Orions subsequently gained a reputation for terraforming; the Pergue imported them to Syrenya to repeat their successes. Syrenya was the earliest completely documented example of terraforming known to Federation scholars.

In the late 23rd century, the Federation's Providence Planetform Research Team studied the terraformed world of Providence III. (FASA RPG module: The Orions: Book of Common Knowledge)

Venus was in the process of being terraformed in the 24th century, with several terraforming stations located on its surface. (DS9 episode: "Past Tense, Part I")

Gideon Seyetik was a renowned Federation terraformer, whose accomplishments included New Halana and Blue Horizon. (DS9 episode: "Second Sight"; SCE eBook: Ishtar Rising, Book 1)

There was a faction within the Federation which argued that terraforming was a violation of the Prime Directive, as it eliminated the potential for the development of life and a subsequent civilization. The Worlds Within Worlds project was thus developed to offer an alternative to terraforming. (NF novel: Missing in Action)

The Gorn referred to terraforming as ecosculpting. (ST - Typhon Pact novel: Seize the Fire)

Terraformed worlds[edit | edit source]

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