I am not an expert in the matter. Some indicate that there is no way to truly shield a human from the radiation of space. Yet again, we are able to keep astronauts in space for months at a time. The technology to steer a spacecraft isn't that fancy. The first space shuttle was driven around by a handful of 386 processors. Think of a dial-up Internet era computer. Now the Apollo nav system was probably much more primitive than that. My point here is that it needs to be not more than a calculator. The computer of that time did not need to handle hd lcds.
The physics of traveling in space are all the same but much easier to predict, as the strong pull of gravity and air drag isn't there. In fact, physics (synergy specifically), does most of the work in the vacuum of space.