Paris Observatory

The Paris Observatory (in French, Observatoire de Paris or Observatoire de Paris-Meudon) is the foremost astronomical observatory of France, and one of the largest astronomical centers in the world.

Constitution

is traced on the floor.]]

Administratively, it is a grand établissement of the French Ministry of National Education, with a status close to that of a public university. Its missions include:

  • research in astronomy and astrophysics;
  • education (four graduate programs, Ph.D. studies);
  • diffusion of knowledge to the public.

It maintains a solar observatory at Meudon () and a radio astronomy observatory at Nançay. It was also the home to the International Time Bureau until its dissolution in 1987.

History

.]] Its foundation lies in the ambitions of Jean-Baptiste Colbert to extend France's maritime power and international trade in the 17th century. Louis XIV promoted its construction starting in 1667, its being completed in 1671. The architect was Claude Perrault whose brother, Charles, was secretary to Colbert and superintendent of public works. Optical instruments were supplied by Giuseppe Campani. The buildings were extended in 1730, 1810, 1834, 1850, and 1951. The last extension incorporates the spectacular Meridian Room designed by Jean Prouvé.

The world's first national almanac, the Connaissance des temps was published by the observatory in 1679, using eclipses in Jupiter's satellites to aid sea-fairers in establishing longitude. In 1863, the observatory published the first modern weather maps. In 1882, a 33 cm astrographic lens was constructed, an instrument that catalysed the ill-fated, international Carte du Ciel project.[]

In November 1913, the Paris Observatory, using the Eiffel Tower as an antenna, exchanged sustained wireless (radio) signals with the United States Naval Observatory to determine the exact difference of longitude between the two institutions.

Meudon 33-inch Great Refractor

The Meudon great refractor (Meudon 33-inch) was a 83 cm (32.6 inch) aperture refractor, which with September 20th 1909 observations by E.M. Antoniadi helped disprove the Mars canals theory. It was a double telescope completed in 1891, with secondary having 62 cm aperture lens for photography. It was one of the largest active telescopes in Europe. (see also List of largest optical refracting telescopes, and Paris Inch)

Directors

  • Giovanni Cassini (1671-1712)
  • Jacques Cassini (1712-1756)
  • César-François Cassini de Thury (1756-1784)
  • Dominique, comte de Cassini (1784-1793)
  • Joseph Jérôme Lefrançais de Lalande (1795-1800)
  • Pierre Méchain (1800-1804)
  • Jean Baptiste Joseph Delambre (1804-1822)
  • Alexis Bouvard (1822-1843)
  • François Arago (1843-1853)
  • Urbain Le Verrier (1854-1870)
  • Charles-Eugène Delaunay (1870-1873)
  • Urbain Le Verrier (1873-1877)
  • Amédée Mouchez (1878-1892)
  • Félix Tisserand (1892-1896)
  • Maurice Loewy (1896-1907)
  • Benjamin Baillaud (1908-1926)
  • Henri-Alexandre Deslandres (1926-1929)
  • Ernest Esclangon (1929-1944)
  • André Danjon (1945-1963)
  • Jean-François Denisse (1963-1967)
  • Jean Delhaye (1967-1971)
  • Raymond Michard (1971-1976)
  • Jacques Boulon (1976-1981)
  • Pierre Charvin (1981-1991)
  • Michel Combes (1991-1999)
  • Pierre Couturier (1999-2003)
  • Daniel Egret (2003-)

Facilities

Paris

Meudon

Saint-Véran

Also known as the Observatoire du Pic de Château Renard, the Observatoire de Saint-Véran was built in 1974 on top of the Pic de Château Renard (2900 m), on the commune of Saint-Véran in the Haut Queyras (Hautes Alpes département). A coronograph was in operation there for ten years; the dome was moved there from the Perrault building of the Observatoire de Paris.[]

Nowadays, the AstroQueyras amateur astronomy association operates the facility, using a 60 cm telescope on loan from the Observatoire de Haute Provence. Numerous asteroids have been discovered there.

References

Bibliography

  • [Anon.] (2001) "Paris Observatory", Encyclopaedia Britannica, Deluxe CDROM edition
  • Aubin, D. (2003). "The fading star of the Paris Observatory in the nineteenth century: astronomers' urban culture of circulation and observation". Osiris 18: 79–100.  [1]

External links

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