Astrology vs Astronomy: Exploring the Differences and Similarities

Astrology and astronomy have long been confused as being the same field of study, when in fact they are quite distinct. Both fields look to the stars, but their purposes and methods differ greatly. In this post, we will explore the key differences and surprising similarities between astrology and astronomy.

What is Astrology?

Astrology is the study of how the positions and movements of celestial bodies impact human lives and events on Earth. Astrologers believe the positions of stars, planets, and other celestial points at the exact time of a person’s birth impacts their personality and destiny.

Horoscopic astrology, the most commonly practiced branch, divides the heavens into 12 sections called houses. Each house governs specific aspects of life, from finances and career to relationships and spirituality. The position of the sun, moon, and planets within these houses at your birth is said to shape your character and path ahead.

Some key elements of astrology include:

  • Zodiac signs – Astrology uses 12 zodiac signs, each ruled by a different celestial body. Your zodiac sign is based on your birth date.
  • Birth charts – Also called natal charts, these diagrams show the precise position of the stars and planets at your exact birth time and location. Astrologers use birth charts to make interpretations and predictions about your life.
  • Horoscopes – Astrologers create written forecasts describing expected events and advice for your zodiac sign. Horoscopes are commonly found in newspapers and magazines.

Key point: Astrology aims to predict earthly lives and events through the interpretation of heavenly bodies.

What is Astronomy?

Astronomy is the scientific study of celestial bodies, space, and the physical universe as a whole. Astronomers use research, math, physics, and space technology to study astronomical objects and phenomena.

Some key aspects of astronomy include:

  • Observational astronomy – This involves directly observing celestial objects like stars, planets, and galaxies using telescopes or spacecraft to collect data.
  • Theoretical astronomy – This field develops computer models and mathematical theories to better understand astronomical observations.
  • Astrophysics – This branch applies physics and chemistry to analyze astronomy. Astrophysicists study things like stellar evolution, black holes, dark matter, and the expansion of the universe.
  • Cosmology – Cosmologists study the universe as a whole, including its origin and structure.

Key point: Astronomy takes a scientific, research-based approach to understanding the physical universe beyond Earth.

Key Differences Between Astrology and Astronomy

While both fields study celestial objects, there are major differences between astrology and astronomy:


Astrology seeks to predict earthly matters and give spiritual guidance. Astronomy aims to build scientific knowledge of the physical universe.


Astrology uses mystical methods like birth charts and zodiacs. Astronomy relies on empirical research using technology, math, and physics.


There is no concrete evidence that astrological predictions are accurate. Astronomical discoveries require rigorous scientific evidence.


Modern science rejects astrology as pseudoscience. Astronomy is considered a mainstream scientific field.

In summary: Astrology is concerned with divination and meaning, while astronomy focuses on physically studying heavenly bodies.

Surprising Similarities Between Astrology and Astronomy

Despite their differences, astrology and astronomy also share some notable similarities:

  • Both fields involve meticulously tracking and plotting the movement of celestial objects. Ancient astrologers laid the foundations for meticulous astronomical mapping.
  • They also share some terminology. For example, the names of the zodiac signs used in astrology come directly from constellations used in astronomy.
  • The fields were not always separate historically. Early astrologer-astronomers like Tycho Brahe contributed to both astronomy and astrology before the scientific method separated them.
  • Both fields require complicated mathematics. Astronomers use math to track orbits, while astrologers use geometry and equations to chart horoscopes.

Key point: The roots of astrology and astronomy are deeply intertwined despite their divergences.


While astrology seeks meaning in the stars and astronomy objectively studies the universe, these fields share an enduring human fascination with the heavens. As scientific knowledge expands, the connections between our small human lives and the enormous cosmos will continue to fascinate thinkers from all perspectives.


American Astronomical Society. “Astronomy vs. Astrology: The Differences Explained.” AAS Nova, 6 Jan 2022,

Fraknoi, Andrew. “Astronomy vs. Astrology: A Guide for the Perplexed.” The Planetary Society, 19 Nov 2019,

Hadhazy, Adam. “Think Astrology is Harmless Fun? Think Again.” Astronomy, Jul 2008,

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