My big idea for Venus, assuming infinite power, would be to shoot a series of big asteroids past it and use the gravity/inertia drag to make it spin faster. Th

My big idea for Venus, assuming infinite power, would be to shoot a series of big asteroids past it and use the gravity/inertia drag to make it spin faster. Then, when Venus is spinning fast enough, collide the asteroids together to give Venus a moon and tides. While all that is going on, use some sort of huge electromagnet to spin Venus' internal heavy core to provide a strong magnetic field to deflect nasty stuff from the Sun and elsewhere. Also build a shield to stop all sunlight reaching Venus, thus freezing the atmosphere onto the surface. That makes reprocessing the crust into something Earth-like much easier. Comets could then be used to provide oceans. Shouldn't take more than a few tens of thousands of years! Seems like something a few humans, downloaded into robots, could do. Mars would remain a scientific research station like Antarctica, assuming that life is found there. I'd treat Europa and anywhere else with life the same way.