He wrote the Tetrabiblos, or Four Books, and laid the foundations of a true astrological science.Julius Firmicus confirmed Ptolemy and enlarged upon his observations.
Astrology From the earliest ages of the world’s history the subject of Astrology has excited the interest of, and exercised a great influence over, the minds of a certain order of thinking men.
The science has never been universal in its acceptance, though it is safe to say that, with its countless adherents in the East and the ever-increasing number of its advocates in the West, there is no faith which has a more universal application than the belief in the influence of the heavenly bodies over the destinies of human beings.
When at aphelion the planets move slower, and when at perihelion they move quicker than at the mean distance.
Astronomers employ an imaginary circular orbit for the planets, in which they move at an uniform rate of velocity, which is called the mean motion.
The literature of the subject is considerable, and the present writer only takes credit to himself so far as his own wide experience and practice have enabled him to present the subject in a simple and brief manner.
The luminaries and planets are known to astronomers under the following names and symbols:— The Sun ☉, Moon ☽, Neptune ♆, Uranus ♅, Saturn ♄, Jupiter ♃, Mars ♂, Venus ♀, and Mercury ☿.
As far back as the year 2154, we find mention of the great importance attaching to the celestial phenomena in the minds of Chinese rulers.
It is recorded in the Historical Classic of China that at that time the astrologers Hi and Ho neglected their duties so that when, on the 10th of October, there was a great eclipse of the Sun at Peking between seven and nine o’clock in the morning, the people were wholly unprepared for it, and “ran about here and there in the utmost consternation.” For this offence Hi and Ho were deprived of their offices, their estates were confiscated and they were driven from the kingdom.
Incomplete as it must needs be, it is yet a veritable science both as to its principles and practice.
It claims for itself a place among the sciences for the sole reason that it is capable of mathematical demonstration, and deals only with the observed positions and motions of the heavenly bodies; and the man who holds to the principia of Newton, the solidarity of the solar system, the interaction of the planetary bodies and their consequent electrostatic effects upon the Earth, cannot, while subject to the air he breathes, deny the foundation principles of astrology.
Mercury and Venus will then appear to revolve around the Sun while the Sun revolves around the Earth, sometimes being between the Earth and the Sun, which is called an Inferior conjunction, sometimes on the further side of the Sun away from the Earth, as at their Superior conjunction; and again, at other times to the right or left of the Sun, in East or West elongation.