# Hipparchus

> 2nd century Greek astronomer, geographer and mathematician

**Wikidata**: [Q159905](https://www.wikidata.org/wiki/Q159905)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Hipparchus)  
**Source**: https://4ort.xyz/entity/hipparchus

## Summary
Hipparchus was a 2nd-century Greek astronomer, geographer, and mathematician. He is best known for his groundbreaking work in celestial observations and mathematical contributions, which laid the foundation for modern astronomy.

## Biography
- Nationality: Greek
- Known for: Pioneering advancements in astronomy, geography, and mathematics
- Field(s): Astronomy, geography, mathematics

## Contributions
Hipparchus made significant contributions to the fields of astronomy and mathematics, including the development of the Schröder–Hipparchus number in combinatorics. His work influenced later scholars and the evolution of scientific understanding.

## FAQs
**What fields did Hipparchus work in?**
Hipparchus was an astronomer, geographer, and mathematician, contributing to multiple scientific disciplines.

**What is Hipparchus known for?**
Hipparchus is known for his pioneering work in astronomy, geography, and mathematics, which laid the groundwork for future scientific advancements.

**Where has Hipparchus worked?**
Hipparchus was associated with the Kingdom of Pergamon during the Hellenistic period.

## Why They Matter
Hipparchus's work in astronomy and mathematics had a lasting impact on scientific progress. His observations and calculations influenced later astronomers and helped shape the development of celestial studies. His contributions remain foundational to the field.

## Notable For
- Pioneered advancements in astronomy and mathematics
- Developed the Schröder–Hipparchus number in combinatorics
- Influenced the evolution of scientific understanding

## Body
### Early Life and Education
Hipparchus was a Greek scholar who lived in the 2nd century. His exact birth and death dates are not recorded, but he was active during the Hellenistic period. He is sometimes referred to as Hipparchus of Nicaea or Hipparchus of Rhodes, reflecting his possible place of origin.

### Career and Contributions
Hipparchus worked as an astronomer, geographer, and mathematician. He was associated with the Kingdom of Pergamon, a Greek state during the Hellenistic period. His most notable contribution is the Schröder–Hipparchus number, a concept in combinatorics that remains relevant in mathematical research.

### Influence and Legacy
Hipparchus's work in astronomy and mathematics influenced later scholars. His observations and calculations laid the groundwork for modern celestial studies. His name is also associated with the Hipparcos satellite, a scientific project of the European Space Agency, and the asteroid 4000 Hipparchus, as well as a crater on Mars named after him.

### Scientific Impact
Hipparchus's contributions to astronomy and mathematics have had a lasting impact on scientific progress. His work in celestial observations and mathematical theory remains foundational to the field. His name is commemorated in various scientific and astronomical entities, reflecting his enduring influence.

## References

1. MacTutor History of Mathematics archive
2. [Source](https://www.nmspacemuseum.org/inductee/hipparchus/)
3. [X-Prize Group Founder to Speak at Induction. El Paso Times. 2004](https://www.newspapers.com/clip/29988299/el_paso_times/)
4. Perseus Catalog
5. Virtual International Authority File
6. CiNii Research
7. Freebase Data Dumps. 2013
8. IdRef
9. CERL Thesaurus
10. Treccani's Enciclopedia on line
11. Quora
12. Enciclopedia Treccani
13. LIBRIS
14. HMML Authority File