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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.The application of these principles to the facts of everyday life is solely a matter of prolonged research and tabulation upon an elaborate scale which has been going on for thousands of years in all parts of the world, so that all the reader has to do is to make his own horoscope and put the science to the test of true or false.The present writer is in a position to know that the study of astrology at the present day is no less sincere than widely spread, but few care to let their studies be known, for, as Prof. Max M�ller recently said, “So great is the ignorance which confounds a science requiring the highest education, with that of the ordinary gipsy fortune-teller.” That to which the great Kepler was compelled “by his unfailing experience of the course of events in harmony with the changes taking place in the heavens,” to subscribe “an unwilling belief,” the science which was practised and advocated by Tycho Brahe under all assaults of fortune and adverse opinion, the art that arrested the attention of the young Newton and set him pondering upon the problems of force and matter, which fascinated the minds of such men as Francis Bacon, Archbishop Usher, Haley, Sir George Witchell, Flamstead, and a host of others, is to-day the favourite theme of thousands of intelligent minds and bids fair to become a subject of popular inquiry.
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 ☿.
The Earth follows the same laws as all other bodies of the same system.
But if we imagine the Earth to be stationary in space and the centre around which the planets revolve, their motions present several irregularities.
Neptune revolves around the Sun in its distant orbit once in about 165 years.
Uranus completes its orbital revolution in 84 years, Jupiter in 12 years, Mars in about 15 months, Venus in 11 months, and Mercury in 18 weeks.
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.