How could you build an artificial planet-sized magnetic field?

I'm conceiving of a world where humans can readily terraform worlds that were once considered "dead" due to the planet's magnetic field being long gone. In such a situation, what could humans do to recreate an artificial magnetic field to protect the planet.

I know it's relatively easy for us to create magnetic fields stronger than that of the earth in a lab, but it's unclear to me how this could be replicated on a planetary scale given an 1/r^2 strength of field over distance

My simplest idea would be a supercooled solenoid running around the planet to generate a magnetic field similar to that on earth. However, I'm not sure how to account for the planet in the center.

is a duplicate

This question has been asked before and has already been answered. It should be marked as a duplicate.

Please enter the URL of the proposed duplicate in the details field below.

not constructive

This question cannot be answered in a way that is helpful to anyone. It's not possible to learn something from possible answers, except for the solution for the specific problem of the asker.

Communities

How could you build an artificial planet-sized magnetic field?

0 comment threads

0 answers