Anders Celsius Swedish Astronomer, Physicist, and Mathematician
Anders Celsius (born November 27, 1701 – died April 25, 1744) was a Swedish astronomer, physicist, and mathematician, best known for inventing the Celsius temperature scale.
Born in Uppsala, Sweden, Celsius studied at Uppsala University, where he later became a professor of astronomy. He was deeply involved in research on the aurora borealis, the shape of the Earth, and astronomical observations that advanced scientific understanding in the 18th century.
Celsius is most renowned for creating the centigrade temperature scale in 1742, which later became known as the Celsius scale. This system standardized temperature measurement, defining 0° as the freezing point of water and 100° as its boiling point at sea level.
His pioneering contributions extended beyond temperature measurement; he also participated in expeditions to measure the Earth’s meridian arc, proving that the planet is slightly flattened at the poles.
Date of Birth: November 27, 1701
Place of Birth: Uppsala, Sweden
Nationality: Swedish
Known for: Celsius Temperature Scale, Astronomy, Geodesy
Scientific Work and Achievements
Celsius conducted extensive studies of the northern lights and published influential work on the aurora. He also worked on precise astronomical measurements and was one of the first scientists to link magnetic field variations with auroral activity.
Personal Life
Anders Celsius dedicated much of his life to research and teaching in Uppsala. Although he died at the age of 42, his discoveries profoundly shaped modern science and everyday life.
Death and Legacy
Celsius died on April 25, 1744, in Uppsala, Sweden. His temperature scale became globally adopted, making his name synonymous with one of the most widely used scientific systems in the world.
Anders Celsius — Scientific Career & Contributions
| Year | Role / Work | Category | Notes |
|---|---|---|---|
| Academic Posts & Travel | |||
| 1730–1744 | Professor of Astronomy, Uppsala University | Academic post | Uppsala chair |
| 1732–1735 | Observatory study tour (Germany, Italy, France) | Scientific travel | European observatories |
| Institutions & Observational Work | |||
| 1725–1744 | Secretary, Royal Society of Sciences in Uppsala | Society role | Scientific administration |
| 1741 | Founded the Uppsala Astronomical Observatory | Infrastructure | Rooftop observatory |
| Geodesy & Earth Science | |||
| 1736–1737 | French–Swedish Lapland meridian-arc expedition (Maupertuis) | Geodesy | Earth flattening proof |
| c. 1730s–1740s | Geographical measurements for Swedish mapping | Surveying | National map work |
| c. 1740s | Early observations of Scandinavian post-glacial uplift | Geology | Land uplift noted |
| Thermometry & Publications | |||
| 1730 | Nova Methodus distantiam solis a terra determinandi | Publication | Solar distance method |
| 1742 | Proposed centigrade temperature scale (originally inverted) | Thermometry | 0 boiling point |
| Scientific Networks | |||
| 1739 | Early member associated with Sweden’s 18th-century scientific societies | Scientific community | Swedish Enlightenment |
Legacy & Influence
- Celsius temperature scale became a global standard in science, engineering, and daily life.
- Helped strengthen Sweden’s 18th-century observational astronomy through Uppsala’s first modern observatory.
- Contributed to geodesy through the Lapland expedition supporting Newton’s oblate-Earth model.
- Recognized as an early observer of Scandinavian land uplift following the last Ice Age.
References
- Encyclopaedia Britannica — Anders Celsius
- Uppsala University — Anders Celsius
- MacTutor — Anders Celsius
- Uppsala University (Astronomy) — History of Astronomy in Uppsala
- The Swedish National Museum of Science and Technology — Anders Celsius