| Who is it? | Discoverer of Invar and Elinvar |
| Birth Day | February 15, 1861 |
| Birth Place | Fleurier, Swiss |
| Age | 158 YEARS OLD |
| Died On | 13 May 1938(1938-05-13) (aged 77)\nSèvres, France |
| Birth Sign | Pisces |
| Alma mater | ETH Zurich |
| Known for | Invar and Elinvar |
| Awards | John Scott Medal (1914) Nobel Prize in Physics (1920) Duddell Medal and Prize (1928) |
| Fields | Physics |
| Institutions | Bureau International des Poids et Mesures, Sèvres |
Charles Édouard Guillaume, a renowned Swiss scientist and the discoverer of Invar and Elinvar, is estimated to have a net worth ranging from $100K to $1M in 2024. Guillaume's groundbreaking contributions in the field of materials science have earned him immense recognition and accolades throughout his career. Invar, known for its low thermal expansion, and Elinvar, valued for their temperature stability, revolutionized various industries including aerospace, horology, and precision instrumentation. Beyond his scientific achievements, Guillaume's expertise and innovations have likely contributed to his considerable net worth, solidifying his status as a leading figure in Swiss scientific advancement.
Guillaume was married in 1888 to A.M. Taufflieb, with whom he had three children.
Guillaume is also known for the earliest estimation of the "radiation of the stars” in his 1896 paper "La Température de L'Espace (The Temperature of Space)". This is the first known reference to the concept that would later be known as the Cosmic Microwave Background.
Guillaume was head of the International Bureau of Weights and Measures. He worked with Kristian Birkeland, serving at the Observatoire de Paris—Section de Meudon. He conducted several experiments with thermostatic measurements at the observatory. He was the first to determine accurately the temperature of space.
