The basic components of the chandrayaan-1 spacecraft are:

• The scientific payloads: the instruments that will gather science data.
  

• The solar array that provides power to the spacecraft. Chandrayaan also carries a battery that stores the power generated by the solar array and feeds it to other systems.
• The thrusters perform fuel burns to change the spacecraft's trajectory and attitude.
• The various functional requirements of the spacecraft such as Attitude and Orbit Control, Command processing, House keeping telemetry, Sensor data processing, Thermal management, payload data handling operation, duel gimbaled data transmission antenna pointing, onboard mission management etc would be taken care by the Bus Management Unit (BMU).
• The spacecraft also carries two star sensors and inertial reference unit based on miniaturized gyros providing absolute attitude.