Connaissance des Temps

The Connaissance des temps (English: Knowledge of Time) is an official astronomical yearly publication in France.

History

Connaissance des temps is the oldest such publication in the world, published without interruption since 1679 (originally named La Connaissance des Temps ou calendrier et éphémérides du lever & coucher du Soleil, de la Lune & des autres planètes), when the astronomer Jean Picard (1620–1682) obtained from the King the right to create the journal. Notable authors were:

• Jean Picard (1620–1682)
• Jean Le Fèvre (1650–1706)
• Giovanni Domenico Maraldi (1709–1788)
• Joseph Jérôme Lefrançois de Lalande (1732–1807)
• Edme-Sébastien Jeaurat (1725–1803)
• Pierre Méchain (1744–1804)
• Bureau des longitudes
  • Rodolphe Radau (1835–1911)
  • Marie Henri Andoyer (1862–1929)

Among the other prestigious ephemerides, The Nautical Almanac was only established in 1767 and the Berliner Astronomisches Jahrbuch in 1776.

Contents

The volumes of the Connaissance des temps had two parts:

• a section of ephemerides, containing various tables
• articles giving a deeper coverage of various topics, often written by famous astronomers

References

• Lalande, "Bibliographie astronomique: avec l'histoire de l'astronomie depuis 1781 jusqu'à 1802", 1803, p. 312, http://books.google.fr/books?id=7fDPAAAAMAAJ
• Cosmos, 2e série, tome II, 1865, page 375, http://books.google.fr/books?id=pRRbAAAAQAAJ
• [1]

External links

• Connaissance des Temps for the years 1679 to 1803
• Connaissance des Temps for the years 1804 to 1935
• Annuaire pour l'an ...,, a popular version for the generak public, for the years 1797 to 1950

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