Self-Replicating Spacecraft

A self-replicating spacecraft is an entity that would, in theory, be able to travel to a neighboring star-system and extract raw materials from celestial bodies to create replicas of itself. Such replicas could then be sent to other star systems, repeating the process in an exponentially increasing pattern. Using relatively conventional theoretical methods of interstellar travel, how long would it take for self-replicating spacecrafts to spread throughout the Milky Way Galaxy? Discuss


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