Astrology is an ancient practice that assumes that the position of the planets and stars has a direct influence upon people and events.
The chart that seeks to make one’s life’s pattern based on the position of the stars and planets at the time of one’s birth is known as a horoscope.
It’s not uncommon to find horoscope readings in magazines and websites, including the social media. Rene Noorbergen explains how these horoscopes are charted:
“For every personal horoscope, the moment of birth is the essential starting point. This, coupled with the latitude and longitude of the individual’s birthplace, provides the initial package for the usual astrological chart.
“While this is elementary, it is not complete; a factor known as ‘true local time’ must also be considered … Once this has been accomplished, the next step is to convert this ‘true’ time into ‘sidereal’ or star time. This is done with the aid of an ephemerus, a reference book showing the positions of the planets in relationship to the earth.” 
Some of these “readings” on the Internet have fascinating headings like “What does your Birth Month say about you?”
There are two popular types of predictive astrology: natal astrology and mundane astrology. Natal (or genetheliacal) astrology makes a predictions based on a person’s character, present situation or future outlook beginning with a birth date.
Mundane astrology usually makes a prediction on a larger scale for a national, civil, or political leadership future.
Many New Age teachers repackage astrology by integrating it with their particular teachings in the Aquarian Age (named after a zodiac sign). They adopt pseudoscientific jargon and hawk their books as well as astrological jewelry, charms and emblems to millions of followers who thirst for the murky waters of mysticism. 
Having been stumped by lack of scientific evidence of planetary influence on man, the new school of astrology has now adopted new interpretations for their practice.
Initially, “it was assumed that some kind of emanations issued from heavenly bodies to affect the characters and destinies of men. When scientists found no emanations powerful enough, sophisticated astrologers abandoned causality altogether and eagerly embraced Jung’s theory of ‘synchronicity’ – that everything in the universe at any given moment participates through that moment with everything else that shares the same unit of time.” 
This shifting of grounds notwithstanding, astrology is so fraught with scientific, moral, logical and theological problems that it will require those adhering to it to renounce reality, abjure reason and deny hard facts in order to follow it.
The Problems of Astrology
1. Astrology is “based on the zodiac, the path through which the sun, moon and planets move through the sky.” This celestial band is divided into 12 “signs” or constellations. 
But here is the big problem: this whole concept of the sun revolving about the earth assumes a geocentric universe in which the earth is the centre of the solar system.
The idea of a geocentric universe was first conceived by Claudius Ptolemy (c. 150), an Egyptian astronomer of Alexandria. But his model of the planetary system has been falsified by the heliocentric cosmology of Nicolaus Copernicus and Galileo Galilei which proved that the planets revolve around the sun.
Astrology, however, is based on the the erroneous geocentric theory which destroys its reliability.
If an astrologer switches to a heliocentric solar system, new problems must arise concerning the positions of the zodiac signs which are positioned from the horizons of the earth instead of the sun.
Therefore, since the basic assumption of astrology is false, all conclusions drawn from it are likewise false.
2. Another basis of astrology is the number of planets in our solar system.
In the ancient times, predictive zodiacal astrology was limited to the planets seen with the naked eye (e.g. the sun, moon, and Mercury through Jupiter). Consequently, astrologers based their system upon the six planets they believed revolved around the earth.
But Galileo changed astronomy by using the telescope for stargazing in 1609. Other planets were later discovered: Uranus (1781), Neptune (1846), and Pluto (1930). Today, most birth charts are cast using all the planets.
One must ask, is all past horoscopy invalidated due to the lack of knowledge of real influential planets?
Here’s another problem. On August 24, 2006, the International Astronomical Union representing 424 astronomers officially demoted Pluto and ruled that it is no longer a planet. 
Now that our solar system is reduced to eight planets, it raises another question, should eight or nine planets be used in astrological charts?
Each choice alters the outcome of casting horoscopes and undermines the legitimacy of past horoscopes from ancient times to present.
3. The bedrock of astrology is the idea that the planets exert much influence on the earth and its inhabitants. This claim lacks any scientific or logical proof, but is founded on pagan superstition.
Mesopotamia has produced the oldest and archaeological evidences for ancient astrology. The Sumerian records that are inscribed on the Gudea cylinders (c. 2250 BC) provide the “earliest collection of celestial observations and their significance as omens.” 
This omen astrology later evolved into a zodiacal theory. The zodiac signs and houses had their origins among Babylonian priests who centered it on their polytheistic religion.
To ascribe the control of humans on earth to these celestial deities was in tune with their worship. Therefore, to embrace astrology involves an implicit acknowledgement of the pagan theology underlying it.
Many modern horoscope followers who claim to be Christians, might argue that they do not subscribe to the pagan beliefs embedded in the zodiac, but there’s no credible evidence that planets and stars emit any force or energy that could affect humans the way astrologers say they do.
Anyone claiming that nature controls your destiny is getting you into an occultic/pagan worldview.
4. Astrologers depend heavily upon the accuracy of determining the exact moment of birth in relationship to the position of heavenly bodies.
But since all hereditary factors are determined at conception, it should logically follow that these planets should begin their influence in a person’s destiny at his conception when life begins, not after his birth.
The fact is, it’s almost impossible to accurately determine when conception takes place. But if astrologers insist that the planets purportedly exert their influence on a person’s fate after birth, we need to ask:
Who determines when a child is born? Is it “Mother Nature?” More often the doctor decides the hour of birth based on his schedule, the mother’s welfare and other external factors.
Would it then be possible for a physician to thwart one’s astrological destiny by using drugs to manipulate the moment when the baby emerges?
5. Most of the predictions made through astrology are often so general and ambiguous that they can be subjectively tied to any occurrence. For example, a horoscope reading says to those who identify as “Sagittarius”:
“Jupiter, the planet of growth enters Sagittarius on November 8 bringing blessings to the home and family sector of your chart … between now and December 2019 you can expect many exciting things to happen on the home front.”
This “prediction” is so vague and mundane that it could apply to anyone at any time.
Even a 10 year old can figure out that “exciting things” usually happen in many homes during holiday seasons, so what exactly is the spectacular prediction being made here?
6. The contrasting character traits of twins, triplets and other multiple births is an insurmountable difficulty for natal astrology.
Thousands of twins are born within 4 minutes of each other – at the same time and place astrologically – yet it has been shown time and again that one or more of the siblings has a strikingly different character than the other.
Two people who are born at the same time can live totally different lives. One may turn out to be very successful, while the other one ends up a failure. The fact that twins do not live out the same lives shows another flaw in the theory. 
7. The problem of authority in astrology is vividly revealed when one realizes that there are many forms of astrology which are diametrically opposed to each other.
There’s Zoroastrian astrology, Egyptian astrology, Chinese astrology, Indian astrology, Graeco-Roman astrology, Pre-Columbian New World astrology, modern astrology and New Age astrology.
Many of these systems are fraught with internal inconsistencies and flawed calculations, yet its overall conflicting variables and lack of standardization presents a logical conundrum to those seeking truth in astrology.
Even in the West, some astrologers rely on eight zodiac signs rather than twelve; some rely on fourteen and even twenty-four signs of the zodiac. The implication is that predictions made by different astrologers for the same individual do not match.
Most people who follow their horoscope can get five conflicting readings from different sources all in one month!
If your calculator gave you five different answers to a simple Mathematical calculation, I can bet you’d throw it out in a garbage bag. In the same sense, why should you stake your life out on a dicey fraud such as astrology?
8. The early astronomers were not aware of procession and therefore failed to take it into account in their system. Newtonian astronomy (1687), however, showed us that the equinox is moving a full 30° zodiacal sign every 2,180 years. 
Each zodiac sign now takes on its preceding sign due to the equinox shifting.
Due to this change in the earth’s position in space, the dates associated with the zodiac signs no longer correspond to when the sun passes through constellations for which the signs were named.
Therefore, someone claiming to be “Libra” might actually be “Virgo” or “Scorpio.” Those who think they are born under Taurus the Bull (April 20 May 20) are actually born under Aries.
So if a horoscope is cast for a Taurus born in April, technically, it would be meaningless since his real sign is Aries.
9. If the theory of influence of planets is valid, it must be true for all people in all places or astrologers must explain how their theory remains true if exemptions exist.
Astrology begun in latitudes relatively close to the equator and made no provision for the possibility that no planet may be in sight in the higher latitudes regions for several weeks in a row. 
This means certain populated northern regions like Siberia, Sweden, the artic regions, or Alaska where the sun never crosses the horizons during these times have no “sun plane” or “zodiacal plane,” as astrologers call it.
Now, since these time periods lie completely outside of astrological charting, the people born in those times and places are exempt from astrology. This is another fatal blow to zodiacal astrology as it unreasonably exempts people born above or below the 66th latitude.
10. The zodiac signs are said to give clues to a person’s character. But this facile assumption is scientifically untenable.
Some studies have been conducted to determine the link between astrology and character traits, and the results found it completely lacking substantiation.
A friend once said to me, “You know, I’m Virgo, and Virgos are compassionate and sensitive,” to which I replied, “I see, but your birth month has no link with your character: your inherited genes and environment mainly determine your character. You would still have those qualities even if you weren’t born in September.”
People who have the same birthday do not have the same traits or life experiences! This can be checked out by anyone.
That’s why astrology conditions people into prejudice, because they judge a person’s behaviour and character by a set of assumptions. People born at various months of the year can all experience the same fortune or face a similar dilemma. The stars foretell nothing.
11. Astrology is basically a fatalistic system. It fosters a predetermined worldview where human moral choices and responsibility are eliminated.
Some modern astrologers even appeal to the Hermetic/occult principle of “as above, so below.” This posits that humans are a miniature mirrored image of the greater planetary macrocosm in the universe.
Now, if everything is predetermined in conjunction with the zodiac, how then can the astrologists get outside of that fatalism to accurately observe it? There is no way they can prove their system if they are pawns in that same system.
Since astrology is fatalistic in its approach, it leaves mankind as a cog in the cosmic machinery – a view of reality that is at odds with Scripture and the ethical virtue of moral responsibility.
Aside from the complete absence of free will from the history of astrology (with its attendant ethical consequences), the system lacks the objective authority necessary to explain our own world. Thus, astrologists are victims of their own system.
By contrast, as Christians we can test our own world view because Someone, Jesus Christ, has come from outside the “system” to tell us, objectively, what our system is like.
12. Astrology is opposed to the Christian world view and any attempt to graft one onto the other must pose a logical dilemma. The Bible forbids God’s people from learning the ways of the heathen, which includes astrology.
“Do not learn the ways of the nations or be terrified by signs in the sky, though the nations are terrified by them” (Jeremiah 10:2).
Bob Larson explained this succinctly:
“The underlying philosophy of astrology declares that one’s destinies can be found in the stars. In contrast, Christianity teaches that the events of life are determined by a combination of God’s sovereign will and man’s personal moral choices.
“Astrology, on the other hand, attempts to destroy man’s accountability to God. Horoscope devotees may think they can fall back on blaming the stars for their actions. But the Bible teaches that someday all mankind will stand before God to be judged (Rom. 14:12). Man is responsible for his conduct and the Lord will not take into consideration the lame excuse that certain stars and planets were in the wrong conjunction.” 
13. Astrology often claims a succession of successful predictions, but what is largely ignored is the number of failures.
One of the most popular astrologers in recent years was the psychic Jeane Dixon, but even she had one failed prediction after another. If astrology is based on a natural force, it should harmonise with science and have a high degree of predictability like other natural forces, but it lacks this.
If it’s based on a supernatural force, it should have a remarkable high success rate, but it also lacks this as well.
Therefore, we are left with a conclusion: astrology is an occult art based on demonic forces that weave the webs of darkness around those who follow them.
14. Many pagan nations sought the counsel of astrologers for centuries and it held them under the spiritual bondage of fear, deception, superstition, retrogression and demon worship.
Even today, many witches and satanists rely on their knowledge of astrology to invoke demons for their spells since they also have their own astrological categories.
We are not to look at the stars, however. God has given us His Son, and we are to follow Him. Only Jesus knows the future, and only as we are in union with Jesus do we have confidence about the future and God’s purpose become clearer to us.
 Rene Noorbergen, The Soul Hustlers, Grand Rapids, MI: Zondervan, 1976, p. 176.
 Walter Martin, Jill Martin Rische and Kurt Van Gorden, The Kingdom of the Occult, Thomas Nelson: TN, 2008, p. 271.
 Anonymous, “Astrology: Fad and Phenomena” in Time magazine, March 21, 1969, p. 58.
 The Encyclopedia of World Religions. Revised Edition. DWJ Books, 2007, p. 51.
 San Francisco Chronicle, August 27, 2006, E-2.
 Samuel Hooke, Babylonian and Assyrian Religion, 1953, Creative Partners p. 91.
 Josh McDowell and Don Stewart The Occult, Here’s Life Publishers, 1992, p. 47.
 Kenneth Boa, Cults, World Religions and You, Wheaton, IL: Victor Books, 1977, pp. 124-125.
 Michael Gauquelin, The Cosmic Clocks, Chicago, IL: Henry Rwgnery Co., 1967, p. 78.
 Larson’s Book of Cults, Tyndale House Publishers, Wheaton, IL: 1983, p. 259.