What is identified as the biggest factor limiting the timeline for achieving a complete, self-sustaining terraforming of Callisto?

Answer

The energy budget and the time needed to deploy the necessary infrastructure.

While the science of warming and gas introduction is known in theory, the sheer scale of energy required and the centuries-long time needed to deploy vast infrastructure like mirror arrays serve as the primary limiting factors.

What is identified as the biggest factor limiting the timeline for achieving a complete, self-sustaining terraforming of Callisto?

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Colonizing Callisto - Third Largest Moon In The Solar System

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