The
Babylonian
priests accordingly applied themselves to the task of perfecting a system of interpretation of the phenomena to be observed in the
heavens, and it was natural that the system was extended from the
Moon, Sun and five
planets to the more prominent and recognizable fixed
stars. The interpretations themselves were based (as in the case of
divination through the liver) chiefly on two factors: • On the recollection or on written records of what in the past had taken place when the phenomenon or phenomena in question had been observed, and • Association of ideas—involving sometimes merely a play upon words—in connection with the phenomenon or phenomena observed. Thus, if on a certain occasion, the rise of the new moon in a cloudy sky was followed by victory over an enemy or by abundant rain, the sign in question was thus proved to be a favourable one and its recurrence would thenceforth be regarded as a good
omen, though the prognostication would not necessarily be limited to the one or the other of those occurrences, but might be extended to apply to other circumstances. On the other hand, the appearance of the new moon earlier than was expected was regarded as unfavourable – prognosticating in one case defeat, in another death among cattle, in a third bad crops – not necessarily because these events actually took place after such a phenomenon, but by an application of the general principle resting upon association of ideas whereby anything premature would suggest an unfavourable occurrence. In this way a mass of traditional interpretation of all kinds of observed phenomena was gathered, and once gathered became a guide to the priests for all times. However, not all of these ideas are still used in astrology as it is usually practiced today.
Astral medicine Astrology was also incredibly important in a practice known as astral medicine. According to a
kalendartext discovered, belonging to a
mašmaššu priest in the late Babylonian period of Uruk named Iqīšâ, different remedies are created for patients for different days, depending on the date. Steele acknowledges that it is entirely possible that the practice of astral medicine is nothing more than a theoretical practice, devised by scholars of the time. Since several of the parts would have been expensive or otherwise impossible for the average Babylonian to obtain, this raises two possible situations. It is very possible that the whole concept of astral medicine in terms of the
kalendartexte and other such sources were, as previously stated, simply theory and never intended for real use. However, Babylonian medicine contains a tradition known as
Dreckapotheke, wherein the names of common ingredients are given names of often unpleasant sounding ones. It is also within the realm of possibility that the ingredients listed in the
kalendartexte are following this tradition. The months were divided into groups of three, alternating by four, evenly split among the four lands. The first, fifth, and ninth months belonged to Akkad, the second, sixth, and tenth belonged to Elam, the third, seventh, and eleventh belonged to Amurru, and the fourth, eighth, and twelfth belonged to Subartu. Days of each month follows the same pattern, beginning with one for Akkad, two for Elam, three for Amurru, four for Subartu, five for Akkad, and so on. Deities of Mesopotamia were associated with certain times, days, and months. In more mythological belief, at the end of each day, the sun god, Shamash, retired to "the lap of heaven" to rest. ==Limits of early knowledge==