Abstract Self-replicating probes are spacecraft with the capacity to create copies of themselves. Self-replication would potentially allow for an exponential increase in the number of probes and thereby drastically improve the efficiency of space exploration. Despite this potential, an integrated assessment of self-replicating space probes has not been presented since the 1980s, and it is still unclear how far they are feasible. In this paper, we propose a concept for a partially self-replicating probe for space exploration based on current and near-term technologies, with a focus on small spacecraft. The purpose is to chart a path towards self-replication with near-term benefits, rather than attempting full self-replication. For this reason, components such as microchips and other microelectronic components are brought with the initial probe and are not replicated. We estimate that such a probe would be capable of replicating 70% of its mass. To further increase this percentage, we identify technology gaps which may be usefully addressed. We conclude that small-scale, partially self-replicating probes are feasible near-term. Their benefits would become significant in exploration missions requiring in the order of a dozen of probes.
Highlights Self-replicating probes may enable exponentially accelerating space exploration We present a concept for a near-term self-replicating probe At least 70% of its dry mass can be replicated Operations would be limited to the inner solar system A technology roadmap for achieving full replication and interstellar exploration
Near-term self-replicating probes - A concept design
Acta Astronautica ; 187 ; 546-556
2021-03-10
11 pages
Article (Journal)
Electronic Resource
English
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