What delta-V? I'm not suggesting it go anywhere too distant. In a few thousand years there will be trillions of sentient beings living in the Kuiper Belt and Oo

What delta-V? I'm not suggesting it go anywhere too distant. In a few thousand years there will be trillions of sentient beings living in the Kuiper Belt and Oort Cloud, trading with each other and building lasting, self-sufficient civilizations.