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The main components of the spacecraft are:

1. Payload: This is the scientific or operational instrumentation that the spacecraft is designed to carry out its mission. This could include cameras, sensors, communication systems, and other instruments.

2. Structure: This is the physical frame of the spacecraft, which provides structural support and protection for all other components. It also helps to maintain the spacecraft's orientation in space and control its attitude.

3. Propulsion System: This is used to provide thrust to move the spacecraft through space and to make changes in its orbit or attitude. It can include chemical thrusters, electric propulsion systems, or other types of propulsion systems.

4. Power System: This is used to provide power for all of the spacecraft's systems and instruments. It can include solar panels, batteries, fuel cells, or other types of power sources.

5. Thermal Control System: This is used to regulate the temperature inside the spacecraft and protect sensitive equipment from extreme temperatures in space. It includes insulation materials and radiators that release heat into space when necessary.

6. Communication System: This is used to send data from the spacecraft back to Earth or other locations in space as well as receive commands from ground control stations on Earth or elsewhere in space. It includes antennas, transceivers, receivers, transmitters, amplifiers, etc..