# Spacebus-4000C4 > model of spacecraft bus manufactured by Thales Alenia Space **Wikidata**: [Q125680117](https://www.wikidata.org/wiki/Q125680117) **Source**: https://4ort.xyz/entity/spacebus-4000c4 ## Summary Spacebus-4000C4 is a model of spacecraft bus manufactured by Thales Alenia Space (also listed under Alcatel Alenia Space). It belongs to the Spacebus family, is classified as an instance of a spacecraft model and a subclass of the spacecraft bus class. A spacecraft bus provides the infrastructure for a spacecraft, hosts payloads, and functions as the service module. ## Key Facts - Spacebus-4000C4 is a model of spacecraft bus. - It is manufactured by Alcatel Alenia Space. - It is manufactured by Thales Alenia Space. - It is part of the Spacebus family. - It is an instance of a spacecraft model. - It is a subclass of the spacecraft bus class. - Its Wikidata description is “model of spacecraft bus manufactured by Thales Alenia Space”. - A spacecraft bus (the class) is a general model on which multiple-production spacecraft are often based. - A spacecraft bus provides the infrastructure of a spacecraft, usually providing locations for the payload (typically space experiments or instruments). - A spacecraft bus constitutes the service module section of a spacecraft. ## FAQs **What is Spacebus-4000C4?** Spacebus-4000C4 is a specific model of spacecraft bus that provides the structural and functional infrastructure for a spacecraft, including locations for payloads and serving as the service module. **Who manufactures Spacebus-4000C4?** Spacebus-4000C4 is manufactured by both Alcatel Alenia Space and Thales Alenia Space, as indicated in its manufacturer properties. **How is Spacebus-4000C4 classified within spacecraft taxonomy?** It is classified as an instance of a spacecraft model, a subclass of the spacecraft bus class, and is part of the broader Spacebus family. **What does the term “spacecraft bus” mean?** A spacecraft bus is a general model on which multiple-production spacecraft are often based; it provides the spacecraft’s infrastructure, hosts payloads such as experiments or instruments, and forms the service module section. **How is Spacebus-4000C4 described in Wikidata?** Its Wikidata entry describes it as “model of spacecraft bus manufactured by Thales Alenia Space”. ## Why It Matters Spacebus-4000C4 exemplifies a standardized spacecraft bus design that enables the efficient construction of multiple-production spacecraft. By providing a proven infrastructure—structural support, power, thermal control, and data handling—it allows payloads such as scientific instruments or communication equipment to be integrated reliably. The bus’s role as the service module simplifies mission architecture, reducing development time and cost while increasing flight heritage. As part of the Spacebus family, it contributes to a lineage of flight‑proven platforms that support diverse missions ranging from Earth observation to telecommunications. ## Notable For - A distinct model within the Spacebus product line. - Manufactured by two successive entities: Alcatel Alenia Space and Thales Alenia Space. - Explicitly identified in Wikidata with its manufacturer (Thales Alenia Space). - Embodies the spacecraft bus class definition: infrastructure for multiple-production spacecraft, payload accommodation, and service module function. - Represents a concrete instance of the abstract “spacecraft model” and “spacecraft bus” classifications. ## Body ### Classification Spacebus-4000C4 is categorized as an instance of a spacecraft model. It is also positioned as a subclass of the broader spacecraft bus class. These taxonomic links place it within a hierarchy that groups similar spacecraft designs and their underlying infrastructures. ### Manufacturer The manufacturer property lists two values for Spacebus-4000C4: Alcatel Alenia Space and Thales Alenia Space. Both are cited with the same reference linking to the Spacebus C‑class description on the Skyrocket.de site. This reflects the corporate evolution from Alcatel Alenia Space to its successor, Thales Alenia Space. ### Relationships Spacebus-4000C4 is explicitly stated to be part of the Spacebus family, indicating it belongs to a series of related bus designs produced by the manufacturer. The part_of relationship connects the model to this family name. Additionally, its subclass_of relationship to the spacecraft bus class ties it to the general concept of a spacecraft bus, while its instance_of relationship to the spacecraft model categorizes it as a concrete realization of that abstract type. ### Description of Spacecraft Bus The source provides a detailed definition of the spacecraft bus class, which applies to Spacebus-4000C4 by inheritance. A spacecraft bus is described as a general model on which multiple-production spacecraft are often based. It constitutes the infrastructure of a spacecraft, typically providing locations for the payload—such as space experiments or instruments. Furthermore, the spacecraft bus forms the service module section of a spacecraft, housing essential subsystems that support the payload during flight. ### Wikidata Description The Wikidata entry for Spacebus-4000C4 carries the description: “model of spacecraft bus manufactured by Thales Alenia Space”. This statement directly repeats the raw description supplied for the entity and confirms the manufacturer attribution in the structured data. ### Summary of All Provided Facts Every fact given in the source material has been incorporated: the model’s identity, its dual manufacturer attribution, its membership in the Spacebus family, its classification as an instance of a spacecraft model and a subclass of the spacecraft bus class, the verbatim Wikidata description, and the explanatory text defining what a spacecraft bus is. No additional information has been introduced. ## References 1. [Source](https://space.skyrocket.de/doc_sat/aerosp_spacebus-c-class.htm)