# Chadwick Trujillo

> American astronomer

**Wikidata**: [Q499195](https://www.wikidata.org/wiki/Q499195)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Chad_Trujillo)  
**Source**: https://4ort.xyz/entity/chadwick-trujillo

## Summary
Chadwick Trujillo is an American astronomer known for his contributions to the field of planetary science. He is recognized for his work in discovering and studying trans-Neptunian objects, particularly his role in the discovery of the dwarf planet Eris. Trujillo's research focuses on the outer solar system and the characterization of small icy bodies.

## Biography
- **Born**: November 22, 1973
- **Nationality**: United States
- **Education**: 
  - University of Arizona (Ph.D.)
  - California Institute of Technology (B.S.)
  - Northern Arizona University
- **Known for**: Discovery of trans-Neptunian objects, including the dwarf planet Eris
- **Employer(s)**: 
  - Gemini Observatory
  - University of Hawaiʻi System
- **Field(s)**: Astronomy, Planetary Science

## Contributions
- **Discovery of Eris**: Trujillo co-discovered the dwarf planet Eris in 2005, a finding that contributed to the reclassification of Pluto as a dwarf planet.
- **Research on Trans-Neptunian Objects (TNOs)**: His work has focused on the detection and characterization of TNOs, advancing understanding of the outer solar system's structure and evolution.
- **Affiliation with Gemini Observatory**: Trujillo has been involved with the Gemini Observatory, utilizing its twin telescopes for astronomical research in both hemispheres.
- **Academic Affiliations**: He has been associated with the University of Hawaiʻi System, contributing to research initiatives in astronomy and planetary science.

## FAQs
**Q: What is Chadwick Trujillo's most notable discovery?**  
A: Trujillo co-discovered the dwarf planet Eris in 2005, which played a pivotal role in the reclassification of Pluto and the broader understanding of trans-Neptunian objects.

**Q: Where has Chadwick Trujillo worked?**  
A: Trujillo has been affiliated with the Gemini Observatory and the University of Hawaiʻi System, among other institutions, contributing to research in astronomy and planetary science.

**Q: What is Chadwick Trujillo's educational background?**  
A: Trujillo earned his Ph.D. from the University of Arizona, a B.S. from the California Institute of Technology, and studied at Northern Arizona University.

**Q: What areas of astronomy does Chadwick Trujillo specialize in?**  
A: His research focuses on the outer solar system, particularly the discovery and study of trans-Neptunian objects, and the characterization of small icy bodies.

## Why They Matter
Chadwick Trujillo's contributions have significantly advanced the field of planetary science, particularly in the study of the outer solar system. His discovery of Eris challenged existing classifications of planetary bodies, leading to a revised definition of a planet by the International Astronomical Union (IAU). Trujillo's work on trans-Neptunian objects has expanded knowledge of the solar system's formation and evolution, influencing subsequent research and exploration missions. His findings have also sparked public interest in astronomy, highlighting the dynamic nature of scientific discovery and classification.

## Notable For
- **Co-discovery of the dwarf planet Eris** (2005)
- **Research on trans-Neptunian objects** and their implications for solar system structure
- **Affiliation with prominent astronomical institutions**, including the Gemini Observatory and the University of Hawaiʻi System
- **Contributions to the reclassification of Pluto** and the IAU's planetary definition

## Body
### Early Life and Education
Chadwick Trujillo was born on November 22, 1973, in the United States. He pursued higher education at the California Institute of Technology, where he earned a B.S. degree. Trujillo furthered his studies at Northern Arizona University and later completed his Ph.D. at the University of Arizona, specializing in astronomy and planetary science.

### Career and Research Focus
Trujillo's career has been dedicated to the study of the outer solar system, with a particular emphasis on trans-Neptunian objects (TNOs). His research involves the detection, tracking, and characterization of these distant icy bodies, which provide insights into the solar system's early formation and evolution. Notably, Trujillo co-discovered the dwarf planet Eris in 2005, a finding that prompted the IAU to redefine the term "planet" and reclassify Pluto as a dwarf planet.

### Institutional Affiliations
Trujillo has been affiliated with several key institutions in the field of astronomy. His work with the Gemini Observatory, which operates twin telescopes in the Northern and Southern Hemispheres, has enabled advanced observational research. Additionally, his association with the University of Hawaiʻi System has contributed to collaborative research efforts in planetary science and astronomy.

### Contributions to Planetary Science
Beyond the discovery of Eris, Trujillo's research has focused on understanding the orbital dynamics and compositional characteristics of TNOs. His work has helped map the distribution of these objects in the Kuiper Belt and the scattered disc, shedding light on the solar system's architectural complexity. Trujillo's findings have been published in reputable scientific journals, furthering academic discourse and guiding future research directions.

### Impact on Scientific Classification
The discovery of Eris, with its mass comparable to or exceeding that of Pluto, directly influenced the IAU's 2006 decision to establish a new category of dwarf planets. This reclassification underscored the evolving nature of scientific understanding and highlighted the importance of ongoing exploration and discovery in astronomy.

### Legacy and Ongoing Influence
Trujillo's contributions continue to shape the field of planetary science. His research informs hypotheses about the solar system's early migration of giant planets and the scattering of primordial objects into the outer regions. As an active researcher, Trujillo remains involved in observational campaigns and collaborative projects, ensuring his work remains at the forefront of astronomical inquiry. His discoveries and insights serve as foundational knowledge for both scientific communities and the public, fostering appreciation for the vastness and mysteries of the cosmos.

## References

1. Freebase Data Dumps. 2013