by Erin Stocks
A few years back I was working on a project to look at the feasibility of interstellar probes. I arrived at this conclusion: the real key to any sort of a probe that could reach nearby stars using propulsion technologies which we could plausibly see in the near future was that the probe itself had to be as small as it could possibly be. That led me to a lot of thinking on the order of how small could you really go. How sophisticated could you actually make a small spaceship?