We're still working out how to get to Mars. Currently it will take close to a year. The longest time someone has spent in space has been just over a year. It i

We're still working out how to get to Mars. Currently it will take close to a year. The longest time someone has spent in space has been just over a year. It is not easy. It is not quick. Even if we travel at the fastest possible speed, it takes 4 years to get to the next star. So, where are they? Too far away to reach. The assumption that these problems are possible to overcome is a big one.