Carl Charlier
Encyclopedia
Carl Vilhelm Ludwig Charlier (April 1, 1862, Östersund
Östersund
Östersund is an urban area in Jämtland in the middle of Sweden. It is the seat of Östersund Municipality and the capital of Jämtland County. Östersund is located at the shores of Sweden's fifth largest lake, Storsjön, opposite the island Frösön, and is the only city in Jämtland. Östersund is the...

 – November 5, 1934, Lund
Lund
-Main sights:During the 12th and 13th centuries, when the town was the seat of the archbishop, many churches and monasteries were built. At its peak, Lund had 27 churches, but most of them were demolished as result of the Reformation in 1536. Several medieval buildings remain, including Lund...

) was a Swedish astronomer
Astronomer
An astronomer is a scientist who studies celestial bodies such as planets, stars and galaxies.Historically, astronomy was more concerned with the classification and description of phenomena in the sky, while astrophysics attempted to explain these phenomena and the differences between them using...

.

He received his Ph.D. from Uppsala University
Uppsala University
Uppsala University is a research university in Uppsala, Sweden, and is the oldest university in Scandinavia, founded in 1477. It consistently ranks among the best universities in Northern Europe in international rankings and is generally considered one of the most prestigious institutions of...

 in 1887, later worked there and at the Stockholm Observatory
Stockholm Observatory
The Stockholm Observatory is an astronomical institution in Stockholm, Sweden, founded in the 18th century and today part of Stockholm University...

 and was Professor of Astronomy and Director of the Observatory at Lund University
Lund University
Lund University , located in the city of Lund in the province of Scania, Sweden, is one of northern Europe's most prestigious universities and one of Scandinavia's largest institutions for education and research, frequently ranked among the world's top 100 universities...

 from 1897.

He made extensive statistical studies of the stars in our galaxy and their positions and motions, and tried to develop a model of the galaxy based on this. He proposed the siriometer
Siriometer
The siriometer is a rarely used astronomical measure equal to one million astronomical units, i.e., one million times the average distance between the Sun and Earth. This distance is equal to about 149,597,870,000,000,000 meters or about 15.813 light-years, which is roughly twice the distance from...

 as a unit of stellar distance.

Charlier was also interested in pure statistics and played a role in the development of statistics in Swedish academia. Several of his pupils became statisticians, working at universities and in government and companies.

Related to his work on galactic structure, he also developed a cosmological theory based on the work of Johann Heinrich Lambert
Johann Heinrich Lambert
Johann Heinrich Lambert was a Swiss mathematician, physicist, philosopher and astronomer.Asteroid 187 Lamberta was named in his honour.-Biography:...

. In the resulting Lambert-Charlier Hierarchical Cosmology, increasingly large areas of space contain decreasing densities of matter, the principle being introduced to avoid the observational inconsistency that would otherwise emerge from Olbers Paradox.

Late in his career, he translated Isaac Newton
Isaac Newton
Sir Isaac Newton PRS was an English physicist, mathematician, astronomer, natural philosopher, alchemist, and theologian, who has been "considered by many to be the greatest and most influential scientist who ever lived."...

's Principia into Swedish.
  • James Craig Watson Medal
    James Craig Watson Medal
    thumb|right|400px|James Craig Watson MedalThe James Craig Watson Medal was established by the bequest of James Craig Watson, and is awarded by the U.S. National Academy of Sciences for contributions to astronomy.The recipients have been:-External links:*...

     (1924)
  • Bruce Medal
    Bruce Medal
    The Catherine Wolfe Bruce Gold Medal is awarded every year by the Astronomical Society of the Pacific for outstanding lifetime contributions to astronomy. It is named after Catherine Wolfe Bruce, an American patroness of astronomy, and was first awarded in 1898...

     (1933)

Named after him
  • Charlier (lunar crater)
    Charlier (lunar crater)
    Charlier is a lunar crater that is located on the far side of the Moon. To the south-southeast is the larger crater Kovalevskaya, and northeast of Charlier is Perrine....

  • Crater
    Impact crater
    In the broadest sense, the term impact crater can be applied to any depression, natural or manmade, resulting from the high velocity impact of a projectile with a larger body...

     on Mars
    Mars
    Mars is the fourth planet from the Sun in the Solar System. The planet is named after the Roman god of war, Mars. It is often described as the "Red Planet", as the iron oxide prevalent on its surface gives it a reddish appearance...

  • Asteroid
    Asteroid
    Asteroids are a class of small Solar System bodies in orbit around the Sun. They have also been called planetoids, especially the larger ones...

     8677 Charlier
    8677 Charlier
    - External links :*...

  • Charlier polynomials
    Charlier polynomials
    In mathematics, Charlier polynomials are a family of orthogonal polynomials introduced by Carl Charlier....


Publications


External links


Obituaries

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