How to make artificial planet? (In theory, of course) If mankind would someday create an artificial planet, what would replace the Earth, must there be some very good reason for that. And the reason can be that the Sun is starting to transforming to red giant star. That would be the end of our civilization and life on Earth if we would not move to another planet. The problem of the suitable planets and particles is that the only planet in our solar system, what would look like Earth is Venus, what is nearer the Sun than Earth. So this planet would not give very much help when the Sun is starting to grow. Of course, there are moons, what has a rocky surface on the solar system, but the problem is that the gravity of those moons is very weak. And they cannot maintain the atmosphere. For the answer to that problem is introduced that all the surface of the moon would be covered by a giant glass- or metal layer, and people would live in this structure. But if we would want to live in ...