14/04/2026
π° What Is a Spacecraft Made Of?
At Kairospace, we have accumulated extensive experience in spacecraft development, and we are ready to share it with those who are interested in space and taking their first steps in this complex and exciting field. π Today, we take a closer look at how spacecraft are built.
Modern satellites are complex systems designed to operate autonomously for years β without maintenance β in the harsh environment of space. In many ways, a satellite is a combination of a power plant, a radio station, and a scientific laboratory β all while maintaining its orientation and collecting useful data. π§ͺπ
Letβs take a closer look at how a spacecraft is built.
At a fundamental level, a spacecraft consists of two main elements: the bus (or platform) and the payload. The payload includes mission-specific instruments β such as cameras, telescopes, or communication relays β while the platform provides everything needed to support and operate those instruments: movement, orientation, power, and data transmission. The payload ultimately defines the mission and often determines the orbit.
π Spacecraft Bus
𦴠Structure (frame): The structure is the rigid βskeletonβ of the spacecraft. It supports all subsystems and payload components. Typically made from aluminum or composite materials, modern spacecraft structures are usually non-pressurized, unlike earlier designs that used sealed, pressurized compartments.
π§ Attitude determination and control system (ADCS): This system determines and controls the spacecraftβs orientation β how it is pointed in space. Sensors such as sun sensors, star trackers, gyroscopes, and accelerometers measure its attitude.
π° Navigation system: While ADCS defines where the spacecraft is pointing, the navigation system determines where it is. It may use GPS (in Earth orbit), radio tracking, navigation cameras, or laser retroreflectors to calculate position and trajectory.
π Propulsion system: The propulsion system enables orbit adjustments, station-keeping, and maneuvering. In space, acceleration is achieved by expelling mass β typically using rocket engines.
βοΈ Power system: A spacecraftβs power system functions as a small solar power plant. It includes solar panels, batteries, power distribution units, and voltage regulation systems, ensuring continuous operation of all onboard systems.
π‘ Communication system: The radio system handles command reception and data transmission β both telemetry and payload data β between the spacecraft and ground stations or other satellites.
π‘ Thermal control system: Spacecraft must operate within strict temperature limits. Thermal control systems include passive elements β such as insulation, heat pipes, and radiators β as well as active components like heaters.
π» Onboard computer: The onboard computer integrates all systems, processes data, and manages spacecraft operations. It ensures that the satellite can perform its mission reliably over long periods.
π¦ Payload
The payload is the reason a spacecraft is launched. It can include a wide range of instruments: radiation sensors, magnetometers, imaging systems for Earth, the Moon, or deep space, as well as communication payloads and relay systems. π
Some spacecraft also carry experimental setups for scientific or engineering research. Despite this complexity, modern satellites can be remarkably compact. CubeSats, for example, can start at sizes as small as 10 centimeters. π
Building a spacecraft is not just βassembling a kitβ β it is a full lifecycle process. It begins with understanding mission requirements and customer needs, and continues through system integration, compatibility verification of hardware and software, testing, and preparation for launch. π
At Kairospace, we bring this experience into the development and manufacturing of small spacecraft. Our product portfolio includes a complete set of subsystems required to build CubeSat-class satellites.
#μ°μ£Όμ°μ
#μΈκ³΅μμ±
