Thus probably arose the astrological belief that the positions of the planets (from the Greek word planetes, "wanderers") in the zodiac could influence worldly events and even cause the rise and fall of kings.
What about relevant considerations like seasonality of utility bills or position of the planets?
The positions of the planets and the Sun, however, are seen to "travel" through the coordinate grid in systematic (though sometimes complicated) patterns.
Its entire flight plan had to be redesigned five times, both because its technical specifications kept changing and because the positions of the planets shifted between launch dates.
Physical phenomena such as tides, eclipses, and positions of the planets could now be predicted whenever the causes were adequately known.
The NASA/JPL Solar System Simulator lets you see the positions of the planets (and more) at any time between 1990 and 2025.
An almanac provides data on the rising and setting times of the Sun and Moon, the phases of the Moon, the positions of the planets, schedules of high and low tides, and a register of ecclesiastical festivals and saints' days.
However, as the two fields of study diverged, the term astrology came to be applied to the interpretation of the positions of the planets for purposes of prognostication, while the science of studying heavenly bodies was known as astronomy.
They thus made it their goal not merely to describe but to calculate the angular positions of the planets on the basis of the numerical and geometric content of the theory.
They enabled calculation of eclipses and the positions of the planets for any given time based on the Ptolemaic theory, which assumed that the Earth was at the centre of the universe.
However, we now know that Pluto is too small to cause a measureable change in Neptune's orbit, and that the "perturbations" were actually just errors in the measurement of the positions of the planets, so Tombaugh was just lucky.
