Chaucer's Works, Volume 3 — The House of Fame; The Legend of Good Women; The Treatise on the Astrolabe; The Sources of the Canterbury Tales

by Geoffrey Chaucer

Astrolabie ben cleped '[sterres of the north],' for they arysen by

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northe the est lyne. And alle the remenant fixed, out of the

zodiak, ben cleped 'sterres of the south;' but I sey nat that they

arysen alle by southe the est lyne; witnesse on [Aldeberan] and

Algomeysa. Generally understond this rewle, that thilke sterres

that ben cleped sterres of the north arysen rather than the degree

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of hir longitude, and alle the sterres of the south arysen after the

degree of hir longitude; this is to seyn, sterres fixed in thyn