# Star Bus

> family of spacecraft buses

**Wikidata**: [Q1131474](https://www.wikidata.org/wiki/Q1131474)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Star_Bus)  
**Source**: https://4ort.xyz/entity/star-bus

## Summary
Star Bus is a family of spacecraft buses, serving as a general model for multiple-production spacecraft. It includes infrastructure for payloads (such as space experiments or instruments) and functions as the service module section of a spacecraft. Developed primarily by Orbital Sciences Corporation and its successors, it is a key component in the design of various spacecraft families like GEOStar, LEOStar-3, and ESPAStar.

## Key Facts
- **Aliases**: RapidStar-1, RapidStar-2, LEOStar-2, LEOStar-3, MicroStar-1, ESPASat, ESPAStar, ExoStar, StarBus
- **Instance of**: Spacecraft family
- **Subclass of**: Spacecraft bus
- **Manufacturers**: Orbital Sciences Corporation, Orbital ATK, Northrop Grumman Innovation Systems, Northrop Grumman Space Systems
- **Has parts**: GEOStar, LEOStar-3, ESPAStar
- **Country of origin**: United States
- **Wikipedia languages**: German, English, Galician, Japanese, Luxembourgish, Portuguese, Ukrainian
- **Freebase ID**: /m/03c_rgm (referenced by Q15241312 on 2013-10-28)
- **Wikidata description**: Family of spacecraft buses

## FAQs
**What is a spacecraft bus, and how does Star Bus relate to it?**
A spacecraft bus is a general model used as the infrastructure for multiple-production spacecraft, typically housing payloads and serving as the service module. Star Bus is a specific family of such buses, designed for various missions and manufactured by multiple U.S.-based companies.

**Which companies have manufactured Star Bus spacecraft?**
Star Bus spacecraft have been manufactured by Orbital Sciences Corporation, Orbital ATK, Northrop Grumman Innovation Systems, and Northrop Grumman Space Systems.

**What are the key variants of Star Bus?**
Key variants include GEOStar, LEOStar-3, and ESPAStar, each tailored for different mission requirements.

**In which languages is Star Bus documented on Wikipedia?**
Star Bus has Wikipedia entries in German, English, Galician, Japanese, Luxembourgish, Portuguese, and Ukrainian.

## Why It Matters
Star Bus plays a crucial role in the design and production of spacecraft, providing a standardized infrastructure for payloads and mission-specific modules. Its modular design allows for flexibility in mission requirements, supporting both government and commercial space programs. By serving as a foundational platform, Star Bus enables cost-effective spacecraft development, reducing time and resources while maintaining reliability. Its widespread adoption across various spacecraft families underscores its importance in modern space exploration and satellite deployment.

## Notable For
- Serving as the backbone for multiple spacecraft families, including GEOStar and LEOStar-3.
- Being a key product of Orbital Sciences Corporation and its successors, reflecting its long-standing role in space infrastructure.
- Supporting diverse mission types through its modular design, from geostationary to low-Earth orbit applications.
- Having a presence in multiple Wikipedia languages, indicating its global relevance and documentation.

## Body
### Overview
Star Bus is a family of spacecraft buses, representing a standardized infrastructure for multiple-production spacecraft. It serves as the service module, housing payloads such as space experiments or instruments. The family includes variants like GEOStar, LEOStar-3, and ESPAStar, each designed for specific mission requirements.

### Classification and Structure
As a **spacecraft bus**, Star Bus is a general model used as the foundation for spacecraft design. It is classified as a **spacecraft family**, with specific variants like GEOStar and LEOStar-3 as its **has parts**. The bus structure provides essential services, including power, propulsion, and thermal control, while the payload section accommodates mission-specific instruments.

### Manufacturers and Development
Star Bus spacecraft have been manufactured by **Orbital Sciences Corporation**, **Orbital ATK**, **Northrop Grumman Innovation Systems**, and **Northrop Grumman Space Systems**, reflecting its long-standing role in space infrastructure. The family's development aligns with the broader evolution of spacecraft design, supporting both government and commercial missions.

### Variants and Applications
Key variants include:
- **GEOStar**: Designed for geostationary missions.
- **LEOStar-3**: Tailored for low-Earth orbit applications.
- **ESPAStar**: Part of the ESPA (Evolved Expendable Launch Vehicle Secondary Payload Adapter System) family, supporting secondary payload deployments.

### Documentation and Global Reach
Star Bus is documented in multiple Wikipedia languages, including **German, English, Galician, Japanese, Luxembourgish, Portuguese, and Ukrainian**, indicating its global relevance. The **Freebase ID** (/m/03c_rgm) further links it to broader knowledge graphs, ensuring its integration into academic and commercial databases.

### Significance in Space Infrastructure
Star Bus's modular design and standardized architecture contribute to cost-effective spacecraft development, reducing time and resources while maintaining reliability. Its adoption across various spacecraft families underscores its importance in modern space exploration and satellite deployment.

## References

1. Freebase Data Dumps. 2013