What Is Astrology And Astronomy

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They sound really similar so what’s the difference between Astronomy and Astrology? They’re both concerned with heavenly bodies too but the truth is the differences between Astrology and Astronomy are in fact ‘astronomical’ (pun intended).

To make things clearer we’ve compiled a list (non-exhaustive) of 12 big differences between Astronomy and Astrology:

1. Astronomy vs Astrology – the basics

The pragmatic science of celestial bodies is Astronomy. The positions, properties, and movements of stars, suns, galaxies, star clusters, planets and other systems are analysed and investigated in Astronomy.

On the other hand, the positions and movements of the celestial bodies and their influences on terrestrial events is the focus of investigation in Astrology.

Interestingly Astronomy original came from astrology, however over the years whilst astronomy developed into a rigorous field of physics, astrology stuck to its roots in ancient wisdom.

2. Astrology and Astronomy have different Ambitions

What is the difference of astrology and astronomy

Is astrology the study of stars? Astrology is the study of galaxies, stars and their movements. Astrology is the scientific study of stars and other celestial bodies. Which is older astrology vs astronomy? Astrology and Astronomy historically were considered the same discipline of study for millennia. They began separating in the 17th century CE and were completely separated by the 18th. Astrology investigates and connects the influence of celestial occurrences on human life and earthly events. Astronomy is a science that studies everything outside of the earth's atmosphere, such as planets, stars, asteroids, galaxies; and the properties and relationships of those celestial bodies. Astronomers base their studies on research and observation. Astrology, on the other hand, is the belief that the positioning of the stars and planets affect the way events occur on earth. Astronomy and astrology 421 triplets of luminars), the transits (a luminar passing over another one or over a former particular position), etc. The interpretation of the horoscope is the subjective part which truly characterises the astrological practice.

The ambition of Astronomy is to understand the structure and formation of the universe. Everything that lies beyond the earth’s atmosphere is the methodical study of astronomy.

The term astronomy came from the Greek termsAstron means (star) and nomos means (law).

On the other hand, the aim of Astrology is the study of motions, and the positions of stars and planets as a means to forecast future events and understand human behaviour, including people’s fate.

3. Cosmic Behaviour vs Human Behaviour

Astronomers look to the skies to study celestial bits and pieces such as moons, comets, planets, and galaxies. They also look at the processes concerned in celestial events such as solar storms, black holes and gamma-ray bursts.


Astronomers seek out the immensity of space for solar systems and exoplanets many light-years away.

However, it should be noted that even prehistoric astronomers recorded the positions of the stars. They used this information for map-reading purposes and also to guess the best time to plant their crops. One can see then why the distinction between astronomy and astrology was not very clear in ancient times.

On the other hand, the practice of astrology started in the use of calendar systems to prognosticate changes in the seasons and understand celestial cycles as messages from the gods.

The Chinese, Native American Indians and the Mayans developed sophisticated methods for studying the cosmos to forecast upcoming events.

These days, astrology is classically linked with horoscopes that are used to understand human behaviour and forecast vital individual events based on the position of the moons, stars, planets and other celestial substances.

4. Pseudo-Science or Ancient Wisdom

In the early days of civilization, the Egyptians and the Mayansbuilt temples as observatories for mapping constellations, to support spiritual practice, and to verify the time of the year.

During these eras, astrology and astronomy were considered to be the same. Theories about movements of the sun were formed by prehistoric Greeks. The spherical shape of the earth was founded by Greek mathematician named Eratosthenes.

Even until a few hundred years ago, astrology enjoyed a place in scientific circles and was actually considered to be connected to astronomy, alchemy, medicine, and meteorology.

However, as scientific methodology advanced astrology found it more and more difficult to fit into it. Eventually, astrology was cast aside by science as being a ‘pseudo-science’.

This label has now become a derogatory slant on the integrity of astrology by people who try to view everything from a hyper-scientific lens.

What Is The Difference In Astrology And Astronomy

Others, however, continue to practice astrology and see value in it as being one of the ancient wisdoms that we’ve relied on upon throughout our human history.

5. The Devil is in the details

In the beginning, astrologers realised it took twelve lunar cycles to orbit around the sun, so they split the year into twelve constellations.

According to the weather and seasons, patterns were noted with certain star groups namely: Aries, Cancer, Virgo, Leo, Taurus, Libra, Sagittarius, Gemini, Capricorn, Aquarius, Pisces, and Scorpio.

On the other hand, to further their understanding of the details of the universe and its genesis astronomers developed their own theories.

Theories like the Big Bang, Cosmic Inflation, Stellar evolution and spectroscopy. Even to this day, new technologies continue to help out astronomers to learn more and to work with other fields of study in order to explore far-away stars, nearby planets and other galaxies.

6. Evolution of Astronomy and Astrology

During World War II astronomy was revolutionised as additional observatories equipped with extra influential and enhanced telescopes were built. With the help of rockets, astronomers were able to accumulate telescopes on satellites that were launched into space.

Over time, with such experiments, astronomers have come to develop astronomy into an immensely technological field with many sub-branches.

On the other hand, in times of war and uncertainty, people begin to rely on astrology to better understand their lives and their place in the universe. Since antiquity, people have relied on astrology to gain insights into themselves and others including their strengths and careers, money, relationships, and weakness.

Despite humanity’s, technological advancements astrology continues to remain a steadfast field and some reports even indicate that it is increasing in popularity.

7. Astronomy and Astrology as Mega-fields

Astronomy is a multidisciplinary field, there are 17 sub-disciplines in total. Information is collected with the help of satellites and telescopes, it is then collated and theorised in order to generate a better picture.

On the other hand, astrology is also known as “mother of all sciences” because the central concepts of astrology are derived from theories that go beyond the realms of scientific study. As mentioned before it is even the mother of astronomy.

Many conceptual and material tools developed in the pursuit of astrology eventually did help in the conception and practice of science.

8. They have different sub-branches

Astronomy is further divided into Stellar Astronomy, Solar Astronomy, Cosmology, Galactic Astronomy, Planetary Science, and Extragalactic Astronomy.

There are also two main branches of astrology. One is the classical or tropical astrology and the other is called sidereal astrology.

9. How Astronomers and Astrologers see Saturn and Jupiter very Differently

Astronomers say that the planet Saturn is an enormous globe of Hydrogen, and Helium surrounded by a ring of snowballs 50,000 km wide, and the Jupiter’s Great Red Spot is a giant storm perhaps ranging from millions of years.


On the other hand, astrologers see it as affecting human characters and fate. Jupiter represents a regal bearing and a gentle disposition. Whilst Saturn is seen as the gravedigger, mistrust, suspicion, and evil.

10. They also see Mars very differently

According to the Astronomers, Mars is a real place just like the Earth with coming up for exploration but the Astrologers see it as a great combatant, instigator of quarrel, distraction, and violence.

What Is Astrology And Astronomy

As you must have realised by now astrology gives qualitative adjectives to heavenly bodies whilst astronomy is more concerned with their quantitative aspects.

11. Historical distinctions between Astrology and Astronomy

Since early time astrologers used the stars to calculate the accurate date, day, month, year and time. Historic astrologers also had the ability to estimate the time of the day through the use of a sundial.

A sundial had a flat surface marked with symbols and a rod in the centre. Depending on the position of the sun, the rod casts a shadow over numerous markings, which indicated the time of day.

Earlier than the 16th century, the practical science between the two was considered to be astrology. During that time Astronomy was mostly theoretical and referred to the act of classifying the stars.

Nonetheless, during the “Age of Reason” astronomy was no longer considered theoretical, but a genuine field of study.

12. The last Scientific Astrologer

Astrology and Astronomy were not always distinctive. The two traditions began to swerve in the mind of Johannes Kepler, and he discovered that a physical force lay behind the motion of planets. He would become the first real Astrophysicist and the last scientific astrologer.

These days, astronomy is considered one of the most valued sciences. Cute illustration zodiac signs horoscope.

Many of history’s famous astronomers were also astrologers examples include Claudio Ptolomeo, Galileo Galilei, Pythagoras, Aristoteles, Hypatia of Alexandria and Thales of Miletus.

Whether or not Isaac Newton was secretly an astrologer is hotly debated.

Astrology vs astronomy definition

Do you have any thoughts to share on the difference between astronomy and astrology? Please do so in the comments section below.

In astrology, a cusp (from the Latin for spear or point) is the imaginary line that separates a pair of consecutive signs in the zodiac or houses in the horoscope.[1]

Because the solar disc has a diameter of approximately half a degree, it is possible for the Sun to straddle the cusp as it moves across the sky. When this occurs at the moment of birth such a person is said to be 'born on the cusp' and some believe that their life is influenced by the characteristics of both signs. For example, if an individual was born when the Sun (by convention the point at the centre of the Solar disc) was located at 29 degrees, 50 minutes Gemini, then one might say that he was born on the cusp of Gemini and Cancer. Much of the Solar disc was actually in Cancer even though the centre was in Gemini.[2]

Although the term 'cusp' is universally used for the boundaries of signs, not all astrologers agree that an object can ever be included in more than one sign. Many consider relevant only the location of the Sun's centre, which must be entirely in one sign, and would describe the natal Sun in the example as simply being in Gemini. If late degrees of Gemini have a Cancer-like character, they would describe that as simply the nature of that part of Gemini rather than some influence spilling over from the next sign.[citation needed]

On the other hand, astrologers who consider objects 'on the cusp' to be meaningfully different from objects entirely in one sign may apply such a description even when no part of the object crosses the boundary. That point of view may consider the Sun to be 'on the cusp' even when its centre is as much as two degrees away from the sign boundary. They may also call other objects (much less than half a degree in diameter) 'on the cusp' despite no part of the object being in the adjacent sign. Their claim is that the influence of the cusp gets weaker but does not suddenly disappear as the object gets further from the cusp.[3]

A similar debate applies to cusps between houses.


  1. ^Riske, Kris Brandt (2010). Llewellyn's complete book of astrology : the easy way to learn astrology. Woodbury, Minn.: Llewellyn Publications. p. 20. ISBN978-0-7387-1724-1. OCLC698085502.
  2. ^Geller, Lindsay (2019-07-29). 'What It Really Means If You're Born On The Cusp Of Two Zodiac Signs'. Women's Health. Retrieved 2020-05-19.
  3. ^Lewis, James R. (2003). The astrology book : the encyclopedia of heavenly influences. Lewis, James R. (Second ed.). Detroit: Visible Ink Press. p. 192. ISBN978-1-57859-246-3. OCLC427511178.
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