Description

The image is a diagram showing the stages of a nuclear thermal propulsion system. The diagram is divided into three main sections, each representing a different stage of the process. The first section is labeled "Nuclear Reactor," which is the initial stage of the system. The second section is labeled "Neutron-Degenerate Fusion," which is the stage where the fusion of atomic nuclei occurs. The third section is labeled "Nuclear Fusion," which is the final stage of the process, where the energy is released. In addition to the main sections, there are several smaller labels throughout the diagram, providing more detailed information about the different stages of the nuclear thermal propulsion system.