# Terrestrial Planet Finder

> proposed project by NASA to construct a system of space telescopes for detecting extrasolar terrestrial planets; postponed several times and finally cancelled in 2011

**Wikidata**: [Q835228](https://www.wikidata.org/wiki/Q835228)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Terrestrial_Planet_Finder)  
**Source**: https://4ort.xyz/entity/terrestrial-planet-finder

## Summary
Terrestrial Planet Finder (TPF) was a proposed NASA project to build a system of space telescopes intended to detect extrasolar terrestrial (Earth-like) planets. The project was postponed repeatedly and was ultimately cancelled in 2011.

## Key Facts
- Terrestrial Planet Finder (TPF) was a proposed project by the National Aeronautics and Space Administration to construct a system of space telescopes for detecting extrasolar terrestrial planets.
- The project was postponed several times and was finally cancelled in 2011.
- Operator: National Aeronautics and Space Administration (NASA).
- Instance of: space telescope (class: instrument in outer space for observing distant space objects).
- Common short name / alias: TPF; other aliases include TPF-I, TPF C, TPF I, TPF-C, 지구형 행성 탐사계획.
- Wikipedia title: Terrestrial Planet Finder; Wikidata description matches the project summary above.
- Image: https://commons.wikimedia.org/wiki/Special:FilePath/Terrestrial_Planet_Finder_PIA04499.jpg
- Freebase identifier: /m/0pqyq.
- Commons category: Terrestrial Planet Finder.
- Wikidata sitelink count: 22; available Wikipedia-language pages include ca, commons, cs, de, en, es, eu, fr, hu, it.
- Microsoft Academic ID (discontinued): 2780494902.

## FAQs
### Q: What was the Terrestrial Planet Finder?
A: The Terrestrial Planet Finder (TPF) was a proposed NASA program to build a system of space telescopes aimed at detecting extrasolar terrestrial (Earth-like) planets.

### Q: Did the Terrestrial Planet Finder ever fly?
A: No. TPF was postponed multiple times and ultimately cancelled in 2011.

### Q: Who ran or would have run the Terrestrial Planet Finder?
A: The project was an initiative of the National Aeronautics and Space Administration (NASA).

### Q: Are there other names or abbreviations for the project?
A: Yes. Common aliases include TPF, TPF-I, TPF-C, TPF I, TPF C, and the Korean name 지구형 행성 탐사계획.

## Why It Matters
Terrestrial Planet Finder mattered because it represented a substantial, dedicated effort by NASA to detect and study extrasolar terrestrial (Earth-like) planets using space-based telescopes. Detecting terrestrial exoplanets is a central goal in astronomy and planetary science because such discoveries advance understanding of planet formation, frequency of potentially habitable worlds, and the broader search for life beyond Earth. Even though TPF was never realized, its proposal reflected scientific priorities and technological ambitions within the space-astronomy community. The program’s postponements and eventual cancellation in 2011 also illustrate how large, long-term space science initiatives can be affected by changing agency priorities and resource decisions. The project remains a referenced concept in discussions about future space telescope designs and exoplanet detection strategies.

## Notable For
- Being a NASA-proposed system specifically focused on detecting extrasolar terrestrial (Earth-like) planets.
- Having been postponed multiple times before its formal cancellation in 2011.
- Being widely referenced under multiple aliases (TPF, TPF-I, TPF-C, etc.).
- Being categorized as a space telescope project and represented in multiple language Wikipedias and Wikimedia Commons.

## Body
### Overview
- Terrestrial Planet Finder (TPF) was a proposed NASA project.
- Its stated purpose was to construct a system of space telescopes for detecting extrasolar terrestrial planets.
- The project is described in its Wikidata entry as "postponed several times and finally cancelled in 2011."

### Status and timeline
- The project experienced multiple postponements.
- The project was cancelled in 2011.

### Names and identifiers
- Primary name: Terrestrial Planet Finder.
- Short name / common alias: TPF.
- Other aliases: TPF-I, TPF C, TPF I, TPF-C, 지구형 행성 탐사계획.
- Freebase ID: /m/0pqyq.
- Microsoft Academic ID (discontinued): 2780494902.
- Wikipedia title: Terrestrial Planet Finder.
- Wikidata sitelink count: 22.
- Wikipedia-language coverage includes: ca, commons, cs, de, en, es, eu, fr, hu, it.

### Classification
- Instance of: space telescope.
- Related class: space telescope — an instrument in outer space for observing distant space objects.

### Institutional data and media
- Operator: National Aeronautics and Space Administration (NASA).
- Wikimedia Commons image: https://commons.wikimedia.org/wiki/Special:FilePath/Terrestrial_Planet_Finder_PIA04499.jpg
- Commons category: Terrestrial Planet Finder.

### References and documentation
- The concise project description and status information are recorded in the project's Wikidata description and related Wikimedia entries.

## References

1. Freebase Data Dumps. 2013