Trepidation - Encyclopedia




GEOGRAPHICAL NAMES Spanish Simplified Chinese French German Russian Hindi Arabic Portuguese

TREPIDATION (from Lat. trepidare, to tremble), a term meaning, in general, fear or trembling, but used technically in astronomy for an imagined slow oscillation of the ecliptic, having a period of 7000 years, introduced by the Arabian astronomers to explain a supposed variation in the precession of the equinoxes. It figured in astronomical tables until the time of Copernicus, but is now known to have no foundation in fact, being based on an error in Ptolemy's determination of precession.

Custom Search

Encyclopedia Alphabetically

A * B * C * D * E * F * G * H * I * J * K * L * M * N * O * P * Q * R * S * T * U * V * W * X * Y * Z

Advertise Here

Feedback





- Please bookmark this page (add it to your favorites)
- If you wish to link to this page, you can do so by referring to the URL address below.

https://theodora.com/encyclopedia/t/trepidation.html

This page was last modified 29-SEP-18
Copyright © 2018 ITA all rights reserved.