# Seth Barnes Nicholson

> American astronomer (1891–1963)

**Wikidata**: [Q436047](https://www.wikidata.org/wiki/Q436047)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Seth_Barnes_Nicholson)  
**Source**: https://4ort.xyz/entity/seth-barnes-nicholson

## Summary
Seth Barnes Nicholson was an American astronomer known for his discoveries of moons orbiting Jupiter and his work at the Mount Wilson Observatory. Born in 1891, he made significant contributions to astronomy, including the identification of 12 Jovian moons and advancements in spectroscopy. His career spanned over four decades, leaving a lasting impact on the field.

## Biography
- **Born**: November 12, 1891
- **Nationality**: United States
- **Education**: Drake University
- **Known for**: Discovery of 12 moons of Jupiter, spectroscopic research
- **Employer(s)**: Mount Wilson Observatory
- **Field(s)**: Astronomy

## Contributions
Seth Barnes Nicholson discovered 12 moons of Jupiter between 1904 and 1951, notably including Elara, Pasiphae, Sinope, Lysithea, Carme, and others. His spectroscopic work at the Mount Wilson Observatory contributed to the understanding of celestial bodies. Nicholson also identified the Nicholson crater on Mars and a lunar crater bearing his name. He was awarded the Bruce Medal in recognition of his astronomical research.

## FAQs
**What were Seth Barnes Nicholson's major discoveries?**  
Nicholson discovered 12 moons of Jupiter and identified craters on Mars and the Moon. His spectroscopic research advanced the study of celestial objects.

**Where did Seth Barnes Nicholson work?**  
He was affiliated with the Mount Wilson Observatory and Drake University.

**What awards did Seth Barnes Nicholson receive?**  
He was a recipient of the prestigious Bruce Medal for his contributions to astronomy.

## Why They Matter
Seth Barnes Nicholson's discoveries expanded the understanding of the Jovian system and Martian geography. His spectroscopic work at Mount Wilson Observatory provided critical data for astronomical research, influencing subsequent studies of planetary bodies. Without his contributions, the identification of several Jovian moons and Martian features would have been delayed, impacting the timeline of solar system exploration.

## Notable For
- **Discovery of 12 Jovian moons**, including Elara, Pasiphae, and Carme.
- **Namesake craters** on Mars and the Moon.
- **Recipient of the Bruce Medal** for outstanding research in astronomy.
- **Spectroscopic advancements** at the Mount Wilson Observatory.

## Body

### Early Life and Education
Seth Barnes Nicholson was born on November 12, 1891, in the United States. He pursued his education at Drake University, laying the foundation for his career in astronomy.

### Career and Discoveries
Nicholson's professional career was marked by his affiliation with the Mount Wilson Observatory, where he conducted significant spectroscopic research. Between 1904 and 1951, he discovered 12 moons orbiting Jupiter, notably Elara, Pasiphae, Sinope, Lysithea, and Carme. These discoveries were pivotal in mapping the Jovian system. Additionally, he identified the Nicholson crater on Mars and a lunar crater named in his honor.

### Affiliations and Recognition
Nicholson was a member of the National Academy of Sciences and worked with Drake University. His contributions to astronomy were recognized with the Bruce Medal, awarded for exceptional research in the field.

### Legacy
Nicholson's work at the Mount Wilson Observatory and his numerous discoveries left a lasting legacy in astronomy. His identification of Martian and lunar craters, along with the Jovian moons, contributed significantly to the field's understanding of celestial bodies. The Bruce Medal underscored his impact, solidifying his reputation as a key figure in early 20th-century astronomy. His discoveries remain fundamental to the study of the solar system, ensuring his contributions are still referenced today.

## References

1. [Seth Barnes Nicholson: 1963 Bruce Medalist. Sonoma State University](https://phys-astro.sonoma.edu/brucemedalists/seth-nicholson)
2. International Standard Name Identifier
3. Virtual International Authority File
4. SNAC
5. Croatian Encyclopedia
6. Freebase Data Dumps. 2013