Vedic Astrology

Vedic Astrology is the ancient Indian Astrology which deals in science associated with the motion and position of the planets, and their effect on living beings. In accordance with Vedic Astrology, there are 27 constellations which make 12 zodiac signs. In these signs, 9 planets represent the different situations of human life. Moon sign of a person is decided by the placement of Moon present in a particular sign during the time of birth. The visualized representation of astrology is termed as 'horoscope chart'.

Sidereal Zodiac

Sidereal Zodiac is the visible zodiac which is based on the visible constellations and planetary positions. Using the birthtime, birthdate and birthplace, planetary positions are calculated and predictions for the future is done by the astrologer.

Tropical Zodiac

Tropical Zodiac is independent of visible constellations, it works on the season. On the spring equinox, Sun transits to 1° of Aries. On MidSummer's day (summer solstice), known to be the longest day of year, Sun enters Cancer. Transit of Sun into Libra Sign occur on the Autumnal Equinox. When the days are short, i.e., on winter solstice, Sun enters Capricorn.

Difference between Indian Astrology and Western Astrology

The difference between Vedic and Western Astrology can be distinguished on some points given below:

On the basis of zodiac sign
According to Indian Astrology, zodiac sign is calculated according to the Moon's placement at the time of birth.

Whereas, in Western Astrology, it is calculated according to the placement of Sun at the birthtime.

On the basis of calculation of planetary position:
In Indian Astrology, the planetary positions are calculated on the basis of their actual positions. That's why, it is also known as Sidereal Zodiac.

Whereas, Western Astrology is dependent on the seasons. Due to this, it is also known as Tropical Zodiac.

On the basis of number of planets used:
In Vedic Astrology, 9 planets are used which are Sun, Moon, Mars, Mercury, Jupiter, Venus, Saturn and the two shadowy planets of Moon and Sun known as Rahu and Ketu.

Whereas, in Western Astrology, for the prediction of future Sun, Moon, Mars, Mercury, Jupiter, Venus, Saturn, Uranus, Neptune and Pluto are used.

Astronomical difference
In Hindu Astrology, there are 27 constellations or fixed group of stars. The alignment of first zodiac, Aries, with the first constellation is known as Ashwini.

But, in Tropical Zodiac, when the Sun passes the equator of Earth, the first sign of zodiac, Aries becomes the starting point.