1 Sensors, for navigation and to perform the scientific mission.
2 Attitude thrusters, to point the space probe to a specific place.
3 Main engine - for velocity changes
4 Communicatons - to send data to earth and receive instructions.
5 'Science packages' - any custom onboard systems for doing the science mission, such as the deployed aerogel panels for catching comet dust particles a few years ago. After their exposure, they had to be retracted for re-entry
5 OPTIONAL: Re-entry system/heat shield. Used on the comet dust space probe.
2 Attitude thrusters, to point the space probe to a specific place.
3 Main engine - for velocity changes
4 Communicatons - to send data to earth and receive instructions.
5 'Science packages' - any custom onboard systems for doing the science mission, such as the deployed aerogel panels for catching comet dust particles a few years ago. After their exposure, they had to be retracted for re-entry
5 OPTIONAL: Re-entry system/heat shield. Used on the comet dust space probe.
