Skip to content
Catholic Online Logo

Astronomer, b. at Kirchberg on the Wagram, in Lower Austria, 2 April, 1745; d. at Vienna 29 January, 1817. At the age of sixteen he entered the Society of Jesus , and, after several years' study of philosophy (Vienna) and mathematics (Tyrnau), he taught at various Jesuit colleges. After the suppression of the Society he went to Gras, where he completed his theological studies and was ordained shortly afterwards. He soon attained a reputation as a mathematician and astronomer and was appointed assistant to the director of the Vienna Observatory, Father Max Hell, whom he succeeded in 1792. He occupied this post during the remainder of his life. Triesnecker was thoroughly grounded in the science of mathematics and its applications to astronomy ; and the accuracy of his observations, which in spite of ill-health he pursued till an advanced age, was universally recognized. His numerous treatises mainly deal with geography and astronomy. A considerable portion of his time was taken up by the "Ephemerides" of Vienna, the editorship of which, after Father Hell's death, he shared with the ingenious computer Burg. In this periodical he published, between the years 1787-1806, his "Tabulae Mercurii, Martis, Veneris, Solares", and the greater part of his micrometrical observations of the sun, moon, planets, and positions of stars. His "Novae motuum lunarium tabulae" were published separately in 1802. Other astronomical investigations may be found in "Zach's monatliche Correspondenz", in the "Commentarii soc. leg. Götting.", and in Bode's "Astron. Jahrbuch". In geography he determined or corrected the longitude and latitude of various places from the best available data. The results of this labour are embodied in the periodicals referred to above, the "Transactions of the Royal Soc. of Bohemia ", and Zach's "Allgemeine geographische Ephemeriden". He completed Father Metzburg's triangulation of lower Austria, using it as a basis for the production of a new map of that country, and assisted him with the triangulation of Galicia. The erection of the "New Observatory" of Vienna (which afterwards gave place to the new structure on the "Turkenschanze") was Triesnecker's work. He was a member of the scientific associations of Breslau, Göttingen, Munich, St. Petersburg, and Prague.


More Encyclopedia

The Catholic Encyclopedia is the most comprehensive resource on Catholic teaching, history, and information ever gathered in all of human history. This easy-to-search online version was originally printed in fifteen hardcopy volumes.

Catholic Encyclopedia

Designed to present its readers with the full body of Catholic teaching, the Encyclopedia contains not only precise statements of what the Church has defined, but also an impartial record of different views of acknowledged authority on all disputed questions, national, political or factional. In the determination of the truth the most recent and acknowledged scientific methods are employed, and the results of the latest research in theology, philosophy, history, apologetics, archaeology, and other sciences are given careful consideration.

No one who is interested in human history, past and present, can ignore the Catholic Church, either as an institution which has been the central figure in the civilized world for nearly two thousand years, decisively affecting its destinies, religious, literary, scientific, social and political, or as an existing power whose influence and activity extend to every part of the globe. In the past century the Church has grown both extensively and intensively among English-speaking peoples. Their living interests demand that they should have the means of informing themselves about this vast institution, which, whether they are Catholics or not, affects their fortunes and their destiny.

Copyright © Catholic Encyclopedia. Robert Appleton Company New York, NY. Volume 1: 1907; Volume 2: 1907; Volume 3: 1908; Volume 4: 1908; Volume 5: 1909; Volume 6: 1909; Volume 7: 1910; Volume 8: 1910; Volume 9: 1910; Volume 10: 1911; Volume 11: - 1911; Volume 12: - 1911; Volume 13: - 1912; Volume 14: 1912; Volume 15: 1912

Catholic Online Catholic Encyclopedia Digital version Compiled and Copyright © Catholic Online


Newsletters

Newsletter Sign Up icon

Stay up to date with the latest news, information, and special offers

Daily Readings

Reading 1, Proverbs 3:27-34
27 Refuse no kindness to those who have a right to ... Read More

Psalm, Psalms 15:2-3, 3-4, 5
2 Whoever lives blamelessly, who acts uprightly, who ... Read More

Gospel, Luke 8:16-18
16 'No one lights a lamp to cover it with a bowl or ... Read More

Saint of the Day

Saint of the Day for September 22nd, 2014 Image

St. Thomas of Villanueva
September 22: Augustinian bishop. Born at Fuentellana, Castile, Spain, he was ... Read More

Inform, Inspire & Ignite Logo

Find Catholic Online on Facebook and get updates right in your live feed.

Become a fan of Catholic Online on Facebook


Follow Catholic Online on Twitter and get News and Product updates.

Follow us on Twitter