Replica

In space and astronautical engineering, a replica refers to a copy or a duplicate of a spacecraft or a component of a spacecraft that is used for testing or training purposes. Replicas are often built to simulate the conditions of space and to test the performance of the spacecraft or its components in a controlled environment. They are also used for training astronauts and ground crew in the operation and maintenance of the spacecraft. Replicas can be full-scale or scaled-down versions of the original spacecraft or component, and they are often made using materials that mimic the properties of the original materials. Replicas are an important tool in the development and testing of spacecraft, as they allow engineers and scientists to identify and address potential issues before the spacecraft is launched into space.
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