Jupiter in Gemini

Gemini sits across from Sagittarius, which makes it a detriment for Jupiter, a word that means only the sign opposite one of his houses. Lilly 1659 states it flatly, then gives the planet degrees 1 to 10 as face and 8 to 14 as terms in the same sign, so the eighth to tenth degrees hold two allotments together. The tables keep a detriment and these small entries side by side.

Raphael's Guide of 1877, its symbol too blurred to read and the entry assigned by sequence, is friendly: a tall, well-composed body, open manners and a liking for science and society. Hot and moist in Lilly's scheme, Gemini also matches the temperament of Jupiter on both counts. A detriment that agrees in temperament and earns praise in a later manual shows how loosely these labels sat together.

Adams 1928 writes that Gemini's restless quality improves when steadied by planets such as Jupiter, and that Mercury's agility in turn adds some joy to him. Modern popular astrology tends to speak of a broad curiosity and a habit of collecting facts and opinions. Those modern phrases go well beyond what the old books say about this pair.