{{Short description|German chronologist and astronomer (1766–1846)}} {{redirect|Ideler|the psychiatrist|Karl Wilhelm Ideler|the German philologist|Julius Ludwig Ideler|the moon crater named for him|Ideler (crater)}} thumb|Christian Ludwig Ideler '''Christian Ludwig Ideler''' ({{IPAc-en|ˈ|ɪ|d|əl|ər}}; {{IPA|de|ˈiːdəlɐ|lang}}; 21 September 1766 – 10 August 1846) was a German chronologist and astronomer.
==Life==
He was born in Gross-Brese near Perleberg. His earliest work was the editing in 1794 of an astronomical almanac for the Prussian government. He taught mathematics and mechanics in the school of woods and forests, and also in the military school. In 1821, he became professor at the University of Berlin, and in 1829 became a foreign member of the Institute of France. From 1816 to 1822, he was tutor to the young princes William Frederick and Charles. He died in Berlin on 10 August 1846.<ref name=EB1911>{{EB1911 |wstitle=Ideler, Christian Ludwig |volume=14 |page=287 |inline=1}} This source reports Ideler becoming a member of the French Institute 18 years after becoming a professor in Berlin.</ref>
==Works==
He devoted his life chiefly to the examination of ancient systems of chronology. In 1825–1826 he published his great work, ''Handbuch der mathematischen und technischen Chronologie'' ("Handbook of mathematical and technical chronology," 2 vols.; 2nd ed., 1883), re-edited as ''Lehrbuch der Chronologie'' ("Textbook of chronology," 1831); a supplementary volume, ''Die Zeitrechnung der Chinesen'' ("The reckoning of time by the Chinese"), appeared in 1839 in Berlin.<ref name=EB1911/>
He wrote also ''Historische Untersuchungen über die astronomischen Beobachtungen der Alten'' ("Historical investigations on the astronomical observations of the ancients," Leipzig, 1806), ''Untersuchungen über den Ursprung und die Bedeutung der Sternnamen'' ("Investigations on the origin and significance of the names of stars")<ref>{{cite book |first=Ludwig |last=Ideler |title=Untersuchungen über den Ursprung und die Bedentung der Sternnamen |url=https://archive.org/details/untersuchungenb01idelgoog |publisher=J. F. Weiss |date=1809}}</ref> and ''Über den Ursprung des Thierkreises'' ("Origins of the zodiac," 1838). With Nolte, he published handbooks on English and French language and literature.<ref>{{Cite AmCyc|wstitle=Ideler, Christian Ludwig}}</ref>
His son, Julius Ludwig Ideler (1809–1842), wrote ''Meteorologia veterum Graecorum et Romanorum''<ref name=EB1911/> — ''Prolegomena ad novam Meteorologicorum Aristotelis — Editionem adornandam''. (PhD thesis, 1832).
==Works== Scans of Ideler's works at Google Book Search: *[https://books.google.com/books?id=9Sv687JBi54C Handbuch der mathematischen und technischen Chronologie] (Volume 1) *[https://books.google.com/books?id=ql56SzvCeJMC Handbuch der mathematischen und technischen Chronologie] (Volume 2) *[https://books.google.com/books?id=FaSPYvehRFMC Lehrbuch der Chronologie] *[https://archive.org/details/untersuchungenb01idelgoog Untersuchungen über den Ursprung und die Bedeutung der Sternnamen]
==Notes== {{reflist}}
==References== {{Wikisource author|wislink=Christian Ludwig Ideler|works=or}} *{{Cite NIE|wstitle=Ideler, Christian Ludwig|year=1905}}
==External links== *{{OL author|2437111A}}
{{Authority control}}
{{DEFAULTSORT:Ideler, Christian Ludwig}} Category:1766 births Category:1846 deaths Category:People from Prignitz Category:Chronologists Category:18th-century German astronomers Category:Historians of astronomy Category:Academic staff of the Humboldt University of Berlin Category:Members of the French Academy of Sciences Category:19th-century German astronomers Category:Members of the Göttingen Academy of Sciences and Humanities Category:Members of the Prussian Academy of Sciences