The introduction of the CDDs should be in a wave form deliberately to cancel the momentum of the planet. Comment: I guess the question is about the Earth's core. Peter; A mere hundred years of solar will get you plenty of power: 3.9e26 watts * 3.15569e9 seconds - whatever amount you leave for the Earth to harvest (or: 90 billion H-bombs a second); assuming you get a Dyson sphere for solar energy capture. Worldbuilding Stack Exchange is a question and answer site for writers/artists using science, geography and culture to construct imaginary worlds and settings. The population debate: Are there too many people on the planet? And then, those wondrous super machines will make all the dirty work for us, and we'll just have to sit down and watch the show. If you can build an atmosphere there in the first place, topping it off every few million years is trivial. Bonus plot device for sequal: seeing how the center of Earth has an assumed temperature in the same order of magnitude as the surface of Sol, it is reasonable to guess in this scenario that. Waves can then be cancelled by introducing equal or opposite waves from the same volume of CDDs to phase in the opposite direction. They believe this is what heats Io's sulfur core and keeps Europa's sub-ice ocean liquid, if so, it's effective but you'd have to move a worldlet, or several, without breaking it up and then put it into an orbit that is constantly on the verge of breaking it up without it actually falling apart. This could increase the rotation of the core/planet, increase the temperature of the mantle at the core border, possibly sink more heavy/fissile material deeper into the core, and kick start the dynamo with newly hot liquified mantle at the cores border. No mambo jumbo though , as you so rudely suggested, for may i state that Arthur C. Clarke's projections about space satellites, or even heavier than air flight machines and landing on the moon , were also considered "mambo jambo" science from the "brilliant" minds of those eras back then.So, No mambo jambo stuff, sir. Same applies to Mars. Close flybys should also create some heat in the process from the friction, but unless you get your calculations spot on, which is very rare when considering all the factors that go into this, Io shouldn't be tidally locked to Mars. Park huge electromagnets in a system of orbital stations in such a manner to generate a similar magnetic field as a planet would. Where is Martha Elliott Bill Elliott ex-wife today? Lv 4. I can think of no feasible delivery system, also no source of the volume of radioactive isotopes that would be required. But I don't know enough about Jupiter's magnetic field or orbital mechanics to know if this is practical - maybe it would be too close and would be torn apart, or you'd get too much heating/earthquakes for it to be practical. Could drilling holes and planting a lot of bombs to one of mars moons, fire it at the surface, and detonating them the instant before impact possibly restart Mars' atmosphere, and maybe its magnetic field. The mantle will start to melt also, causing huge marsquakes & volcanic activity in the process, but that's an inevitable side effect we just crave for , as it will also help jump-starting the martian plate tectonics that are now inactive. Won't the surface be irradiated by Jupiter's magnetic field? As long as it keeps cool, you can have persistent currents sustaining the field, without the need of a current source. (Again, changing rotation was not requirement) And how and why would core increase rotation?