What are the main components of a spacecraft's power subsystem?

A spacecraft's power subsystem is crucial for providing electrical power to all its onboard systems and instruments throughout the mission. It ensures the spacecraft's functionality, communication, propulsion, data processing, and payload operations. The main components of a spacecraft's power subsystem include: 1. Power Generation System: The power generation system converts energy from available sources into electrical power. The two primary sources of power for spacecraft are: * Solar Arrays: Solar arrays consist of photovoltaic cells that convert sunlight into electrical energy. These arrays are typically mounted on the spacecraft's body or deployable panels to maximize exposure to the Sun. Solar arrays provide power for most missions in the inner solar system, such as Earth-orbiting satellites and interplanetary missions. * Radioisotope Thermoelectric Generators (RTGs): RTGs use the heat generated by the radioactive decay of isotopes, such as Plutonium-238, to produce electricity. RTGs are commonly used in deep space missions where sunlight is limited, such as outer planet missions or missions exploring regions with low solar intensity. 2. Power Conditioning and Distribution: The ....