# Michael E. Brown

> American planetary astronomer

**Wikidata**: [Q298913](https://www.wikidata.org/wiki/Q298913)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Michael_E._Brown)  
**Source**: https://4ort.xyz/entity/michael-e-brown

## Summary
Michael E. Brown is an American planetary astronomer renowned for his discoveries of dwarf planets and other celestial bodies in the outer Solar System. Born on June 5, 1965, he is a professor at the California Institute of Technology (Caltech) and has significantly contributed to the reclassification of Pluto as a dwarf planet. His work has reshaped the understanding of the Solar System's structure and composition.

## Biography
- **Born**: June 5, 1965
- **Nationality**: American
- **Education**: 
  - B.S. in Physics, University of California, Berkeley
  - Ph.D. in Astronomy, University of California, Berkeley
- **Known for**: Discovery of dwarf planets Eris, Haumea, and Makemake; role in Pluto's reclassification
- **Employer(s)**: California Institute of Technology (Caltech)
- **Field(s)**: Planetary science, astronomy

## Contributions
- **Discovery of Dwarf Planets**: Identified Eris (2005), Haumea (2004), and Makemake (2005), which led to the International Astronomical Union's redefinition of a planet in 2006, reclassifying Pluto as a dwarf planet.
- **Research on the Kuiper Belt**: Conducted extensive studies on Kuiper Belt objects, advancing knowledge of the Solar System's outer regions.
- **Public Engagement**: Authored the book *How I Killed Pluto and Why It Had It Coming* (2010) and maintains a public outreach website, *Mike Brown's Planets*.
- **Awards**: Recipient of the Harold C. Urey Prize (2003) and the Kavli Prize in Astrophysics (2023).

## FAQs
**Q: What is Michael E. Brown's most notable discovery?**  
A: Brown discovered the dwarf planet Eris in 2005, which directly influenced the International Astronomical Union's decision to reclassify Pluto as a dwarf planet.

**Q: Where has Michael E. Brown worked?**  
A: Brown is a professor at the California Institute of Technology (Caltech). He previously studied at the University of California, Berkeley, where he earned his B.S. and Ph.D.

**Q: What awards has Michael E. Brown received?**  
A: Brown has received the Harold C. Urey Prize (2003) for early-career achievements in planetary science and the Kavli Prize in Astrophysics (2023) for his contributions to understanding the Solar System.

**Q: How has Michael E. Brown influenced public understanding of astronomy?**  
A: Through his book *How I Killed Pluto and Why It Had It Coming* and his public outreach efforts, Brown has made complex astronomical concepts accessible to a broad audience.

## Why They Matter
Michael E. Brown's discoveries and advocacy have fundamentally altered the classification of celestial bodies in the Solar System. By identifying objects like Eris, he prompted a global scientific debate that led to the redefinition of a "planet," impacting both academic research and public education. His work on the Kuiper Belt has expanded humanity's knowledge of the Solar System's formation and evolution. Without Brown's contributions, the understanding of planetary diversity and the criteria for planethood would remain outdated.

## Notable For
- **Discovery of Eris, Haumea, and Makemake**: Directly led to Pluto's reclassification.
- **Kavli Prize in Astrophysics (2023)**: Recognized for transformative contributions to planetary science.
- **Harold C. Urey Prize (2003)**: Honored for early-career achievements in planetary science.
- **Public Outreach**: Author of *How I Killed Pluto and Why It Had It Coming* and maintainer of *Mike Brown's Planets*.
- **Influence on Planetary Classification**: Played a pivotal role in the International Astronomical Union's 2006 resolution on the definition of a planet.

## Body
### Early Life and Education
Michael E. Brown was born on June 5, 1965. He developed an interest in astronomy early in his career, pursuing higher education at the University of California, Berkeley, where he earned both his B.S. in Physics and his Ph.D. in Astronomy.

### Career and Research
Brown joined the California Institute of Technology (Caltech) as a faculty member, where he conducts research focused on the outer Solar System. His work involves the discovery and characterization of Kuiper Belt objects, which are remnants from the Solar System's formation. Using advanced telescopic surveys, Brown identified several notable dwarf planets, including Eris, Haumea, and Makemake. These discoveries challenged existing classifications, ultimately leading to the International Astronomical Union's 2006 decision to redefine the term "planet," reclassifying Pluto and establishing the category of dwarf planets.

### Contributions to Planetary Science
- **Eris Discovery (2005)**: Eris, initially considered the tenth planet, was found to be more massive than Pluto, sparking the debate over planetary definitions.
- **Kuiper Belt Exploration**: Brown's research on Kuiper Belt objects has provided insights into the Solar System's early history and the processes of planetary formation.
- **Advocacy for Planetary Reclassification**: Brown publicly supported the reclassification of Pluto, emphasizing the scientific necessity of a clear distinction between planets and dwarf planets.

### Awards and Recognition
Brown's contributions have been recognized with prestigious awards, including the Harold C. Urey Prize (2003) for his early-career work and the Kavli Prize in Astrophysics (2023) for his transformative impact on the field. These honors reflect his standing as a leading figure in planetary science.

### Public Engagement and Outreach
Beyond his academic work, Brown has engaged the public through his book *How I Killed Pluto and Why It Had It Coming* (2010), which chronicles his role in Pluto's reclassification. His website, *Mike Brown's Planets*, serves as an educational resource, making astronomical discoveries accessible to the general public.

### Legacy and Influence
Michael E. Brown's discoveries and advocacy have reshaped both scientific understanding and public perception of the Solar System. His work underscores the dynamic nature of astronomical classification and the importance of ongoing exploration. By challenging existing paradigms, Brown has inspired new generations of scientists and educators, ensuring his legacy as a pivotal figure in 21st-century planetary science.

## References

1. Integrated Authority File
2. WorldCat
3. [ORCID Public Data File 2023](https://pub.orcid.org/v3.0/0000-0002-8255-0545/employment/543416)
4. [Source](https://dps.aas.org/prizes/2001)
5. Mathematics Genealogy Project
6. [Source](https://thesis.library.caltech.edu/5968/1/final_submitted.pdf)
7. Virtual International Authority File
8. MusicBrainz
9. NNDB
10. [Michael E. Brown – NAS](https://www.nasonline.org/directory-entry/michael-e-brown-l6huu8/)
11. Freebase Data Dumps. 2013
12. Norwegian Authority File: Persons and Corporate Bodies
13. Goodreads
14. [Source](https://twitter.com/plutokiller)
15. [Source](https://www.podchaser.com/creators/mike-brown-107a4XiV0C/appearances)