>>12593733>any major affect on the surface?We don't want them to have an affect of the surface. We want them to exert tidal forces on the core of mars strong enough to cause enough friction to liquify the core, which would create a dynamo effect, which would generate a magnetosphere.
The earth's moon used to have a liquid core when the moon orbited closer to the earth, but it solidified when the orbit moved further away, and the moon lost its magnetosphere. If we could move the moon back to a lower orbit we could have an atmosphere on the moon, but it would be difficult to move something so large directly. It would be easier to manipulate its orbit through inserting a large asteroid into orbit around earth and using its gravity to change the moon's orbit. Obviously the moon being closer would have an effect on earth. The tides would be more extreme, for example.
Mars also used to have a liquid core, but the planet is much smaller than earth, so cooled faster. With Mars we have a system of three bodies, Mars and its two moons. We could insert an asteroid towed from the asteroid belt into that system to disrupt it, which would change the orbits of the moons. It might be possible to make their orbits more elliptical or lower them so the three moons would exert stronger tidal forces on Mars, strong enough to liquify the core, but I don't know the math, it's just a technique I heard about.
