# space habitat

> type of spacecraft, intended as a permanent settlement

**Wikidata**: [Q9328551](https://www.wikidata.org/wiki/Q9328551)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Space_settlement)  
**Source**: https://4ort.xyz/entity/space-habitat

## Summary
A **space habitat** is a type of spacecraft designed as a permanent settlement in space, intended to support human habitation beyond Earth. These structures are part of broader efforts in space colonization and have been conceptualized in various forms, including rotating cylinders, spherical shells, and inflatable modules.

## Key Facts
- **Classification**: A space habitat is a specialized spacecraft intended for long-term human habitation.
- **Parent concepts**: Includes O'Neill colonies, Bernal spheres, and rotating habitats like the Stanford torus and McKendree cylinder.
- **Related projects**: Experimental habitats like Genesis I (2006) and Genesis II (2007) have been launched for testing.
- **Commercial efforts**: Bigelow Aerospace has proposed habitats like BA 2100 and BA 330.
- **Aliases**: Also known as space settlements, space colonies, or orbital habitats.
- **Part of**: Space colonization initiatives.
- **Subclass of**: Space habitats are categorized under astroengineering objects.
- **Wikidata ID**: /m/011h6_ (from Freebase).
- **Wikipedia presence**: Available in multiple languages, including English, Spanish, and Japanese.

## FAQs
### Q: What is the difference between a space habitat and a space station?
A: A space habitat is designed for permanent human settlement, while a space station is typically a temporary or modular facility for research and short-term habitation.

### Q: Who proposed the first space habitat design?
A: The Bernal sphere, a large hollow spherical shell, was proposed in 1929 by John Desmond Bernal.

### Q: Are there any real-world space habitats in operation?
A: Experimental habitats like Genesis I and II have been launched, but no permanent space habitats exist yet.

### Q: What are the main challenges in building a space habitat?
A: Key challenges include life support systems, radiation protection, artificial gravity, and the high cost of construction and launch.

### Q: How do rotating space habitats work?
A: Rotating habitats, like the Stanford torus or McKendree cylinder, use centrifugal force to simulate gravity, making them more habitable for humans.

## Why It Matters
Space habitats represent a critical step in human expansion beyond Earth, offering a potential solution to overpopulation, resource scarcity, and environmental degradation. By establishing permanent settlements in space, humanity could secure long-term survival, conduct scientific research in a microgravity environment, and explore deeper into the solar system. However, the technological, financial, and logistical challenges remain substantial. Despite these hurdles, space habitats symbolize humanity's ambition to become a multi-planetary species.

## Notable For
- **First proposed habitat**: The Bernal sphere (1929) was an early conceptual design.
- **Rotating habitats**: The Stanford torus and McKendree cylinder are notable for their artificial gravity solutions.
- **Experimental testing**: Genesis I and II provided early data on inflatable habitat technology.
- **Commercial ventures**: Bigelow Aerospace has advanced inflatable habitat designs.
- **Fictional inspiration**: The *Terrarium* from Kim Stanley Robinson's *2312* is a well-known fictional habitat.

## Body
### Conceptual Designs
Space habitats have been envisioned in various forms, including:
- **Bernal spheres**: Proposed by John Desmond Bernal in 1929, these are large, hollow spherical shells filled with air.
- **O'Neill cylinders**: Proposed by Gerard K. O'Neill, these are rotating cylinders designed to provide artificial gravity.
- **Stanford torus**: A toroidal (doughnut-shaped) habitat with rotating sections to generate gravity.
- **McKendree cylinder**: A NASA-proposed rotating cylinder habitat.

### Real-World Efforts
- **Genesis I and II**: Experimental inflatable habitats launched in 2006 and 2007 to test expandable habitat technology.
- **Bigelow Aerospace**: Developed BA 330 modules and proposed BA 2100, an inflatable habitat for commercial use.

### Challenges
- **Life support**: Requires closed-loop systems for air, water, and food.
- **Radiation protection**: Space habitats must shield occupants from cosmic rays and solar radiation.
- **Artificial gravity**: Rotating designs are necessary to simulate Earth-like gravity.
- **Cost and logistics**: High launch costs and complex assembly processes pose significant barriers.

### Future Prospects
While no permanent space habitats exist yet, ongoing research and private-sector efforts aim to make them feasible. Advances in materials science, 3D printing, and in-situ resource utilization could accelerate development.

```json
{
  "@context": "https://schema.org",
  "@type": "Thing",
  "name": "Space habitat",
  "description": "A spacecraft designed for permanent human habitation in space.",
  "sameAs": [
    "https://www.wikidata.org/wiki/Q15241312",
    "https://en.wikipedia.org/wiki/Space_settlement"
  ],
  "additionalType": "Spacecraft"
}

## References

1. Freebase Data Dumps. 2013
2. Quora