Eli5: What are the main things holding humanity back when it comes to being able to Terraform a planet or other large celestial objects in space?

Question

Eli5: What are the main things holding humanity back when it comes to being able to Terraform a planet or other large celestial objects in space?

In: 14

Answer 1

Number one issue, the energy requirements for assembling the resources over the distances required.

Answer 2

Number one issue, the energy requirements for assembling the resources over the distances required.