Corpus of Electronic Texts Edition
An Irish Astronomical Tract (Author: [unknown])

Caibidil 34

Concerning the sphere of the fixed stars.

Haec sphaera octavo situatur in loco, etcetera.

This sphere is situated at the eighth place in the firmament, and is formed after the pattern of Aries and Taurus and Gemini and the other signs of the Zodiac. The stars of that sphere move exactly, equally and equidistantly from each other at every season for ever and ever from the west of the world to the east, for they are not accelerated or retarded nor have they a direct course, nor a retrogressive motion like the wandering stars, and they spend a hundred years traversing one of the degrees of the great sphere.