Benjamin Valz
Who was Benjamin Valz?
French astronomer
Biographical data adapted from Wikipedia’s article on Benjamin Valz (CC BY-SA 4.0).
Biography
Jean Elias Benjamin Valz was born on May 27, 1787, in Nîmes, France, and passed away on April 22, 1867, in Marseille. He came from a notable family: his father was the politician Jean Valz, and his maternal grandfather was Pierre Baux (1708–1790), a well-known physician, meteorologist, and naturalist. Valz was initially trained as an engineer before he became interested in astronomy, a field he pursued for the rest of his life. He was especially fascinated by comets, and his precise observations and calculations gained him recognition in the scientific community.
Valz observed the return of Comet Encke and then made detailed calculations of the orbit of another comet, earning him recognition and the Lalande Prize from the French Academy of Sciences in 1832. He was also named a Knight of the Legion of Honour for his contributions to science in France. His dedication to astronomy led him to build a private observatory at his home in Nîmes, showing both his financial resources and his serious commitment to the field.
In 1835, Valz proposed that certain irregularities in the orbit of Comet Halley might be due to the gravitational pull of an undiscovered planet beyond Uranus. This idea came eleven years before the discovery of Neptune in 1846. Although Valz did not get the same credit as Urbain Le Verrier and John Couch Adams for predicting Neptune, his early thoughts showed a deep understanding of celestial mechanics.
In 1836, Valz moved from Nîmes to become the director of the Marseille Observatory, a role he held for many years. Before leaving, he allowed astronomer Joseph Jean Pierre Laurent to continue using his private observatory. It was from this location at 32 rue Nationale in Nîmes that Laurent discovered the asteroid 51 Nemausa in 1858. A plaque on the building marks this achievement. Valz was initially credited with discovering two asteroids, 20 Massalia and 25 Phocaea, but later historical reviews attributed these discoveries to the Italian astronomer Annibale de Gasparis and Valz's colleague Jean Chacornac, respectively.
After Valz's death in 1867, his widow donated 10,000 francs to the French Academy of Sciences in 1874, asking for the funds to create a prize in her husband's name. The resulting Valz Prize, or Prix Valz, was awarded from 1877 through 1970 for outstanding astronomical work, similar to that recognized by the Lalande Prize, ensuring that Benjamin Valz's name remained linked to the progress of astronomy long after he passed away.
Before Fame
Benjamin Valz grew up in Nîmes at the end of the eighteenth century, a time of major political and intellectual change in France. His family background opened doors to education and ideas not commonly available: his father was a politician and his grandfather was a naturalist and meteorologist, suggesting a family engaged with both public life and scientific inquiry. Valz trained as an engineer, which gave him a solid foundation in mathematics and applied science.
Thanks to this technical background, Valz was drawn to astronomy, a rapidly advancing field in the early nineteenth century with improved instruments and mathematical methods allowing for more precise observations. His focus on comets put him at the forefront of one of the most active areas of astronomical research at the time, and his decision to invest in a private observatory at home shows how seriously he pursued the science even before receiving any institutional appointments.
Key Achievements
- Won the Lalande Prize from the French Academy of Sciences in 1832 for calculating the orbital elements of a comet.
- Hypothesized in 1835 that an undiscovered planet beyond Uranus could explain anomalies in Comet Halley's orbit, anticipating the discovery of Neptune.
- Served as director of the Marseille Observatory beginning in 1836.
- Awarded the Knight of the Legion of Honour for contributions to French science.
- His private observatory in Nîmes facilitated the discovery of asteroid 51 Nemausa by Joseph Jean Pierre Laurent.
Did You Know?
- 01.Valz hypothesized in 1835 that an unknown planet beyond Uranus was perturbing Comet Halley's orbit, more than a decade before Neptune was officially discovered in 1846.
- 02.He built a private observatory at his home at 32 rue Nationale in Nîmes, which was later used by Joseph Jean Pierre Laurent to discover asteroid 51 Nemausa.
- 03.Although Valz was once credited with discovering asteroids 20 Massalia and 25 Phocaea, both discoveries were eventually reassigned to other astronomers — Annibale de Gasparis and Jean Chacornac, respectively.
- 04.His widow donated 10,000 francs to the French Academy of Sciences in 1874 to establish the Valz Prize, which was awarded for nearly a century, from 1877 to 1970.
- 05.Valz's maternal grandfather, Pierre Baux (1708–1790), was a physician, meteorologist, and naturalist, suggesting that scientific inquiry ran across at least three generations of the family.
Family & Personal Life
Awards & Honors
| Award | Year | Details |
|---|---|---|
| Lalande Prize | 1832 | — |
| Knight of the Legion of Honour | — | — |