retrogradation of Jupiter.

• +..Psyche rock
• +..Gnod Gyro day
• +..Gasba

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In our time, knowledge is fragmented into hundreds of specialities and subspecialities. No one science occupies a central place. But in ancient Greece and medieval Islam, as well as in medieval Europe, astronomy held a privileged place, with important connections to philosophy and religion, as well as to art and literature. For the ancient Pythagoreans, astronomy was one of the four chief branches of mathematics, along with arithmetic (i.e., number theory), geometry, and music theory. In the medieval universities these same four arts became the quadrivium—the upper-level sequence of courses in the arts curriculum. Thus, an introduction to astronomy remained a central part of the experience deemed essential for an adequate education. A complete history of the astronomical tradition certainly cannot leave out of account the relation of astronomy to the broader culture.
Evans, James. The History and Practice of Ancient Astronomy