Free online courseZodiac Signs, Tropical vs. Sidereal, Aquarian Age by David



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Tutorial videos on nearly every area of astrology, such as: basic astrology, Vedic astrology, midpoints, harmonic astrology, Vibrational astrology, astrology software, and astrology research. Tutorial videos on sacred geometry. Tutorial videos on zodiac signs, houses, meanings of planets and houses. Videos on forecasting methods like transits, secondary progressions, primary directions, etc.

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Aries: Warrior, Pioneer, Lone Wolf, or Self-Reliant

Based on interviews and consultations with thousands of people and a research study using extreme case sampling, the consistent theme found with people born with many planets in Aries is that they are self-reliant. Some of the other traits associated with Aries are not consistently found.

The Sirius 2.0 software is used to do the research. Sirius is developed and copyrighted by Cosmic Patterns Software and the company website is

This video and other videos by David Cochrane are of greatest interest to people that are interested in a more rigorous evidence-based approach to astrology than the usual way in which astrological ideas are developed from traditional beliefs in anecdotal evidence.

David Cochrane started a professional practice in astrology and began teaching astrology in 1972, has written 2 books, has spoken at over 40 major astrology conferences, is a computer programmer for Cosmic Patterns Software and Matrix Software, and is internationally recogni


Taurus and the Tao: Evidence from Research on Zodiac Sign Taurus

Astrologers believe that Taurus makes a person persistent, stubborn, steady, down-to-earth, practical, sensual, enjoy comfort and having material things. Is it true?

By using a research procedure called Extreme Case Sampling on over 20,000 famous people with accurate birth times we conclude that the personality characteristics and behavior from the zodiac Taurus are not obvious, clear, or consistent. Nevertheless, I suggest that there is some real significance to zodiac signs and Taurus indicates a way of approaching life and a perspective for seeing the world. The perspective of Taurus, which may not be consciously articulated by the person with a lot of Taurus, is to listen to one's instincts, to wait until the time feels right, and to unfold from within.

I also suggest that astrologers put more emphasis on aspects rather than zodiac signs and we see that in the birth chart of rock singer Eric Burdon, that he has the signature of rock stars: Venus, Uranus, and Pluto aspected to eac


Gemini: Curiosity and the Need to Enjoy Learning About the World We Live In

A research study on the zodiac sign Gemini reveals that many ideas about Gemini are true, but that the need of Gemini to explore is so strong that anxiety and even depression and anger can develop when the person with a strong Gemini influence is forced to devote most energy to pressures and demands rather than enjoy the process of learning and experiencing the rich variety of life. Gemini does not seem ultimate answers so much as it just wishes to enjoy the rich diversity of experiences and continue to learn.

Rather than rely simply on anecdotal evidence, this tutorial video shares the results of an extreme case sampling study using the Sirius 2.0 software. The Sirius 2.0 software is developed by Cosmic Patterns Software and the company website is


Cancer: the "Cosmic Egg"

The zodiac sign Cancer is often described as inclined to be sentimental, emotional, nostalgic, and to love home and family.

In this video we learn about a research study using extreme case sampling that confirms that people with very strong Cancer in the birth chart express strong personal feelings. The theory that each zodiac sign represents an attitude towards the world, a perspective or lens through which we see the world and how we relate to the world is consistent with the findings of this research.

We suggest that Cancer is the desire to create a safe place, a place where we can express oneself in natural way, and without having to play a formal role in life. In this protected and safe place Cancer shares the mood and feelings, and the personal close bonds that occur within this protected environment. Cancer does have a need for a close family and most of the personality characteristics associated with Cancer are typical expressions of the fundamental Cancerian need for a pla


Leo: Lion King or Identity Formation

The zodiac sign Leo is described by many astrologers as being proud, regal, and charismatic, Leo likes to be the center of attention. Leo has a strong personality and stands out in a crowd. At best, Leo is a leader, very creative, sincere, loyal, and a strong personality who brings a ray of sunshine wherever he/she goes. At worst, Leo is self-absorbed, arrogant, and always bringing the conversation around to himself/herself.

However, research indicates that this description does not consistently work very well. Leo is the process of synthesizing, coordinating, integrating, and expressing our talents, motivations, and resource into a creative, personal expression. Leo is concerned with developing personal potential and becoming all that we are capable of becoming. Sometimes Leo manifests as shyness instead of pride. Leo can also take a strong interest in the personal development of others as well as themselves.

The Sirius astrology software is used in this video. Sirius is developed a


Virgo: Fussy or Platonic?

The usual astrological interpretation of Virgo is that Virgo is detail-oriented, fussy, picky, and critical. Virgo likes to categorize things and keep everything perfectly organized. Virgo is neat and fastidious.Virgo also is service-oriented. Virgo is inclined to be humble, with a desire more to serve than to shine on the front stage.
We find Virgos (people with many planets in Virgo) working as analysts, accountants, secretaries, and specialists.

In this video we share the results of a study of people who have the greatest amount of Virgo in their birth charts and we find that they fit this alternative interpretation of Virgo:

Virgo is instinctively very sensitive to the underlying natural order. Virgo strives to make us appreciate this inherent beautiful order and to improve our lives by living in tune with the natural order.

Virgo strives to make our lives aligned with the natural order, design, and laws of nature. Although not usually conscious of it, Virgo gives a kind of Plat


Libra: Building Relationships

The usual interpretation of Libra is that Libra seeks balance in everything and avoids extremes. Friends are extremely important and Libra will often go along with what a friend wants to do and may not even voice their own preference or opinion. Ruled by Venus, Libra avoids confrontation and frequently will nod their head in agreement with you when actually the Libran disagrees. Rather than risk an argument or unpleasant encounter, Libra inclines to “go with the flow” and acquiesce, thereby avoiding confrontations and arguments.

The people with the most Libra in their birth charts among thousands of people with recorded birth times are:

Frank Coppola, Mafia mobster
Mercello Abaddo, music conductor, composer and pianist
Walther Rathenau, politician and industrialist
Clemence Poesy, actress and model

Frank Coppola, a Mafia leader, was not a quiet, meek, and complacent person. Librans are not necessarily indecisive and meek. However, from the biographical information available, it ap


Scorpio: Snake, Eagle, and Phoenix

The zodiac sign Scorpio is, of course, the scorpion, but some astrologers also relate Scorpio to a snake, eagle, and Phoenix. Scorpio is said to the sign of transformation and also a sign that makes a person intense, secretive, mysterious, charismatic, and sexy.

In a study of the most extreme famous Scorpio people we see if these ideas about Scorpio are true. The famous people with the most extreme Scorpio are: biologist Hans Driech, actress Rosemary DeCamp, Olympic long jumper Salim Sdiri, and murderer Ryan Burgess. We also look at the birth chart of another extreme Scorpio, comedian Art Carney. This study suggests that Scorpio inclines a person to intensely bond and to fully immerse themselves in whatever they do. Thus, there is a popular image of Scorpio as the heart surgeon or hypnotist. This intense bonding often, but not always, inclines the person to have the personality characteristics, life experiences, and archetypal themes that are attributed to Scorpio.

The Sirius 2.0 so


Sagittarius: Life is An Adventure

Using the database of over 85,000 chart data and over 22,000 chart data with AA accuracy and the research features in the Sirius 2.0 software we find people who have a very large number of planets in Sagittarius. We analyze the biographical information to see if the people have Sagittarian personality characteristics.

The four people with the most Sagittarius in their birth charts are artist Maria Perego, composwer Joaquin Turina, Mafia mob boss Lucky Luciano, and murderer Charles Stuart. All four people approach life with the large vision and grand scope that Sagittarius brings to whatever it does. Perego creates a puppet who tells the Sagittarian story of facing trials in life's adventures and eventually reaching success. Turina composes a rich variety of musical pieces for different kinds of instruments, orchestras, and he incorporates many elements into music that is uplifting. Sagittarius always takes us on an adventure. Luciano runs a large criminal enterprise on a grand scale


Capricorn: Witness Consciousness

Using the research features and over 85,000 chart data and over 22,000 chart data with AA accuracy in the Sirius 2.0 software, we see if the four people with the most Capricorn actually have Capricorn personalities. These 3 people are: writer Francesco Alberoni, literary editor Herbert Grierson, and the writer-historian Jean Daniel-Rops. Thee birth data of these 3 people has AA accuracy and we also consider opera manager Rudolph Bing whose birth time accuracy is A.

We conclude that all of these people have in their lives an emphasis on approaching life in a detached and objective manner. For example, Alberonia writes in an objective way about the nature of love, romance, and sexuality and develops what he considers a "science of love". The Capricorn inclination to see life with this objectivity is clear but other traits associated with Capricorn are not as conspicuous from his biography. The proposed interpretation of Capricorn as an approach to life in which the ability to see things


Aquarius: Eccentric, Ideological, or Finding One's Social Network?

A research study on the zodiac sign Aquarius suggests that the major personality trait of Aquarius is a motivation to participate in a social group, and to be a part of a collective that is bigger than oneself. The Sirius 2.0 software is used to find people with extreme Aquarius in their chart in this research study that uses extreme case sampling. The Sirius 2.0 software is developed by Cosmic Patterns Software and the company website is


Pisces: Mystic, Dreamer, or Eclectic?

Astrological meaning of Pisces based on an evidence-based approach to astrology. Extreme case sampling is used to understand what the astrological significance of the zodiac sign Pisces is.


Zodiac Signs: 12 Phases of a Cycle

In this book "The Pulse of Life" Dane Rudhyar suggested that signs are primarily 12 phases of a cycle. The personality characteristics and behaviors of a zodiac sign are expressions of being in a particular phase. This insight brings greater clarity to our understanding of zodiac signs.


A New View of Zodiac Signs

Zodiac signs very often do not describe a person's overall personality and behavior very well but they do appear to describe something important about how a person relates to the world and the lens through which a person sees the world. Examples of 3 three famous people are used to illustrate how the zodiac signs do not describe the overall personality and behavior of a person but do describe the way in which the person relates to the world given whatever talents and motivations the person may have. The Sirius 1.3 software is used in this tutorial video. Sirius is developed and copyrighted by Cosmic Patterns Software and the company website is


Zodiac signs: From Ptolemy and Valens to Alan Leo and Linda Goodman

The modern interpretation of zodiac signs is very different from the ancient interpretations. We will find that Ptolemy and Valens interpreted zodiac signs differently from each other, and we will see how the modern approach to zodiac signs is different from both Ptolemy and Valens. Somewhat surprisingly, the evidence suggests that our modern understanding of zodiac signs did not get fully formed until the mid 20th century.


The Basis of the Tropical Zodiac: Sacred Geometry (Not Seasons)

In astrology the tropical zodiac signs are often described as "cosmic seasons". Aries is the burst of energy of the Spring season, Libra is the perfect balance when night and day are of equal length, etc.

However, there are many problems with this concept of signs = seasons. It makes more sense to view zodiac signs as based on sacred geometry rather than the seasons.

Ten reasons are given in this video for why the signs = seasons paradigm does not work very well:

1. The seasons are reversed in the southern hemisphere.

2. The timing of the seasons varies in different places. The burst of energy of Spring occurs in some places when the Sun is in Pisces and other places when the Sun is in Taurus.

3. The signs = seasons paradigm is not used consistently. For example, we rarely hear about the sign Cancer = the start of Summer because the connection is not clear.

4. The zodiac signs are separate segments of 30 degrees but the seasons change gradually. Therefore, zodiac signs and seaso


How Fibonacci Numbers Create the Zodiac

Because the tropical zodiac begins at the Vernal Equinox, astrologers have emphasized that the zodiac is a kind of measurement of the seasons. However, sharing in common the vernal equinox is about the only thing that the seasons and the zodiac have in common. A much more compelling and convincing basis for the tropical zodiac is in sacred geometry.

We hypothesize that structures in Space are created through the fundamental process of Spin, which at the level of fundamental particles has angular momentum but no motion (according to physicists) and at the level of large physical objects is expressed as rotation of objects (such as planets and spinning tops) and orbits of planets around stars and moons around planets. Although this hypothesis may seem far-fetched and a huge leap from the known laws of physics, we present many reasons why this may not be as large a leap as it seems at first. Furthermore, our proposed model for why there is a zodiac integrates the known laws of the unive


Which Zodiac is Correct: Tropical Or Sidereal?

Key points in this tutorial video:

1. Astrology was dramatically transformed between 500 BC and the year 1 AD.

2. Prior to this transformation, constellations and star groups were used and then the sidereal zodiac and then the tropical zodiac was developed. The constellational zodiac is the oldest form of astrology.

3. After the transformation of astrology after 500 BC the sidereal and tropical zodiacs became more important than the constellations.

4. Star groups, known as asterisms, are still important today in Vedic astrology in the form of the 27 nakshatras.

5. Ptolemy's work The Tetrabiblos had a huge impact on astrology for generations and up to today. Ptolemy used the tropical zodiac. Ptolemy knew about precession of the equinoxes and he understood the difference between the tropical and sidereal zodiacs. Ptolemy did NOT confuse the siderealand tropical zodiacs and erroneously use a tropical zodiac instead of a sidereal zodiac as some people claim.


Is Ophiuchus the 13th Zodiac sign?

Some people claim that Ophiuchus is a 13th sign of the zodiac. By referring to a map of the sky we can see that the constellation Ophiuchus is on the zodiac path (ecliptic plane). However, an astrology based on constellations would also have to address the problems of gaps between the constellations, overlapping constellations, and other constellations that are near the zodiac path such as Orion. A quote of Ptolemy's book the Tetrabiblos makes it clear that ancient astrologers did not base astrology on constellations. Constellations simply are different from zodiac signs and Ophiuchus is not a 13th sign of the zodiac.

Related to the issue of Ophiuchus is the sidereal zodiac and whether the tropical zodiac or sidereal zodiac is better. I use the tropical zodiac but the sidereal zodiac is used by the majority of astrologers in India and it is possible that both zodiacs have some validity.


The Age of Pisces and the Age of Aquarius: What They Are (Updated Explanation)

The Astrological Ages are created by the movement of the Vernal Equinox and the Autumnal Equinox in retrograde motion through the fixed stars and constellations. We learn what the Vernal and Autumnal Equinoxes are and that the tropical zodiac is based on them.

We also learn about the sidereal zodiac, which, like the tropical zodiac consists of 12 signs of 30 degrees each but is based on the fixed stars rather than the Vernal Equinox and the Tropical zodiac.

The movement of the Vernal and Autumnal Equinoxes retrograde through the constellations is caused by the slow wobble of the Earth and is known as the precession of the equinoxes. The equinoxes (and therefore the tropical zodiac) move through the constellations at a rate of about 1 degree per 72 years, which is equal to about 2,160 years for 30 degrees, and almost 26,000 years for the entire circle of 360 degrees.

The sidereal zodiac sign that the Vernal Equinox is in determines the Astrological Age. Because the exact position of