So, one project I've been working on in the background for the past few years is a NIAC (NASA innovative advanced concepts program) proposal for using gravitati

So, one project I've been working on in the background for the past few years is a NIAC (NASA innovative advanced concepts program) proposal for using gravitational assists between a pair of planets to harvest energy from planetary motion by transferring momentum from the inner planet to the outer one. The harvested energy could be used to accelerate more mass into the loop and exponentially increase the coupling. In theory, this could move Mars into an Earth-like orbit over the course of a century while harvesting millions of yottajoules of usable energy. I call the proposal "Moving planets for fun and profit". If you know anyone who is into orbital mechanics, I could use a collaborator. I have to spend most of my time on slightly less far-out projects.