Encke , Johann Franz

Encke , Johann Franz
(1791–1865) German astronomer
The son of a Lutheran pastor from Hamburg, Encke was educated at Göttingen where he impressed Karl Gauss. In 1816 he was appointed to the staff of the Seeberg Observatory, Gotha, where he remained until 1825 when he moved to the Berlin Observatory as its director.
A faint comet had first been observed by P. Mechain in 1786. Over the years other reports were made in 1795, 1805, and 1818 of a series of faint comets. Although several astronomers suspected there was only one comet involved, it was Encke who provided in 1819 the necessary computations. He showed thatEncke's comet, as it became known, had a period of 3.3 years and predicted that it would be at perihelion again on 24 May 1822. His prediction was accurate to within a few hours and Encke thus became, after Halley, only the second man to predict the return of a periodic comet successfully.

Scientists. . 2011.

Поможем написать курсовую

Look at other dictionaries:

  • Encke, Johann Franz — ▪ German astronomer born Sept. 23, 1791, Hamburg died Aug. 26, 1865, Spandau, Ger.       German astronomer who in 1819 established the period of the comet now known by his name (see Encke s Comet).       Encke was educated at Hamburg and the… …   Universalium

  • Encke, Johann Franz — ► (1791 1865) Astrónomo alemán. Determinó la órbita del cometa que lleva su nombre …   Enciclopedia Universal

  • ENCKE, JOHANN FRANZ —    a celebrated German astronomer, born at Hamburg; determined the sun s distance, and the orbit of the comet of 1680; calculated the time of the revolution of the comet which now bears his name, and which appeared in 1818; determined also the… …   The Nuttall Encyclopaedia

  • Johann Franz Encke — Johann Encke Johann Franz Encke (* 23. September 1791 in Hamburg; † 26. August 1865 in Spandau bei Berlin) war ein deutscher Astronom. Er entdeckte u. a. die nach ihm benannte Enckesche Teilung des Saturnrings, berechnete die Bahnen von… …   Deutsch Wikipedia

  • Johann Franz Encke — Naissance 23 septembre 1791 Hambourg (Allemagne) Décès 26 août 1865 Spandau (Allemagne) Nationalité Allemande Champs …   Wikipédia en Français

  • Johann Franz Xaver Arnold — Nacionalidad …   Wikipedia Español

  • Johann Franz Xaver Arnold — war ein deutschsprachiger Hochschullehrer, Schriftsteller und Botaniker. Es ist unsicher, ob dies sein wirklicher Name oder nur ein Pseudonym war. Sein offizielles botanisches Autorenkürzel lautet „J.F.Arnold“. Arnold ist nach offizieller… …   Deutsch Wikipedia

  • Johann Franz Encke — Infobox Scientist name = PAGENAME box width = image size =250px caption = PAGENAME birth date = 23 September 1791 birth place = Hamburg death date = 26 August 1865 death place = Spandau residence = citizenship = nationality = German ethnicity =… …   Wikipedia

  • Encke — Johann Franz …   Scientists

  • Encke — Encke, Johann Franz …   Enciclopedia Universal

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”