Every astrologer has asked themselves this question at some point in their life.
Supporters of Vedic astrology often say that their system is more scientifically accurate: since the Earth’s axis is constantly changing, this movement should be taken into account. According to them, the positions of the stars used by Western astrology are no longer the same as they were in the past, and the dates should therefore be adjusted.
Western astrologers, on the other hand, argue that they have been using these same “coordinates” for more than 2,000 years, and that their system has always worked.
So, who is right? And, more importantly, how can we determine which interpretation of a natal chart is actually more accurate?
Yes, it is true that the Earth’s orientation changes and that the apparent positions of the stars in the sky shift over time. But when exactly did this change occur?
The vernal point — that is, 0° Aries — was located directly within the constellation of Aries approximately from 1866 BC to 68 BC. Then, due to the precession of the equinoxes, it gradually moved into Pisces. This is what modern astronomy tells us.
Interestingly, the major ancient astrological texts date from a period when the vernal point was associated with Aries.
At some point, however, Indian astrologers decided to change the relationship between the zodiac signs and their degrees. In 1955, the Calendar Reform Committee of India adopted a reference based on the star Spica, known as Chitrā in Sanskrit. According to this reference, the ayanāṃśa was set at 23°15′ on March 21, 1956.
This standard subsequently became the basis for official Indian ephemerides and calendars.
Before 1955, however, there was no single, unified “Indian system.” Several different calculation methods were used simultaneously in different regions of India. Between 1952 and 1954, the Calendar Reform Committee examined approximately thirty calendars and pañcāṅgas used in different parts of the country. In 1954, the committee decided that a variable ayanāṃśa should be used for the nakshatras in order to preserve their positions relative to the stars.
However, if we are talking about the actual constellations rather than the twelve 30-degree signs of the Indian zodiac, the boundaries are somewhat different, because the real constellations are neither equal in size nor divided into uniform 30-degree sections.
In other words, modern Vedic astrology also relies on a conventional system of calculation, particularly for the purpose of standardizing calendars and religious festivals. Therefore, the claim that this system is inherently more “scientific” or more logical is not as straightforward as it may seem.
Western astrologers, meanwhile, developed their calculations and interpretations based not only on the positions of the planets and stars, but also on their relationship to the seasons and their supposed influence on agricultural cycles. Over time, they also began observing changes in mood associated with different phases of the Moon, recurring personality traits among people with similar planetary configurations, and many other correlations.
All of this knowledge and experience, accumulated over centuries, developed within this particular reference system.
So why do so many people firmly reject Western astrology?
One reason may be that the characteristics of neighboring signs can be quite similar, which creates a certain amount of confusion. The more subtle differences can only be recognized through extensive experience — sometimes 30 to 50 years of practice — and astrologers with that level of experience are extremely rare.
Popular astrology, which has gained a mass following, generally describes very broad personality traits. People easily recognize themselves in these descriptions simply because such traits are common to almost everyone.
At the same time, during a consultation, an astrologer often asks leading questions that can gradually shape the interpretation around a person’s particular circumstances.
But if we take an honest look within ourselves and compare the two charts — the sidereal and the tropical — we may notice some interesting differences.
Ultimately, all we need to do is be honest with ourselves and avoid trying to make reality fit an interpretation that was never really there in the first place.