There are a number of challenges associated with surviving in outer space: the current human need for oxygen, water, food, waste management, heating, as well as space's lack of gravity, being unable to hear what is going on outside, and other issues all make space life a difficult proposition. Any Casual Interstellar Travel drive requires an hour to "warm up" and is the most fragile thing on the ship. A single pebble travelling sufficiently quickly could kill you, or at least destroy one of those important life-support systems; these systems are either very-high-maintenance or require the use of an AI to keep everything under control. If you were to send a