If you imagine these bodies to be revolving in a plane around the Sun and yourself to be standing within the Sun, the motions of these bodies will appear almost uniform and always in one direction.
Were the orbits of the planets circular and the Sun holding the centre of the circle, their motions would be constant, that is to say, always in the same direction and at the same rate.
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.
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.
The annexed illustration will assist the lay reader perhaps.
The subsequent discovery of the planets Uranus and Neptune by Herschel and Adams, widened the field of research and gave to later astrologers the clue to much that hitherto had been imperfectly understood.
Not that these discoveries overturned the whole system of astrology, as some have imagined and foolishly stated, or that they negatived the conclusions drawn from the observed effects of the seven anciently known bodies of the solar system, but it became possible after a lapse of time to fill in the blank spaces and to account for certain events which had not been traced to the action of any of the already known planets.
It is believed that the present work will be of considerable assistance to those who seriously contemplate an initial study of the science of horoscopy, and although it by no means exhausts what is known on the subject, yet it will be found accurate and reliable as far as it goes, and will enable any one of ordinary intelligence to test the claims of Astrology for himself.
This is as much as can be expected in the limits of a small handbook.
This is subject to an equation depending on the position of the planet in its orbit, and it determines the difference between the imaginary planet and the true planet.