Astrology is a divine science which correlates astronomical movements of planets with physical, psychic and atmik/ soul's responses. this science based on basic assumptions that planets do influence us, that law of karma and theory of cause and effect is genuine and there is continuity of life even after physical death.It is a science of the influence of the planets and stars on human and terrestrial affairs. The planetary motions and their positions and time(kaal)do have effects on us. with the regular movements of planets one can fortell the destinies of men,fates of nation, sudden inundations, earthquakes, volcanic eruptions and other incidents relating to terrestial phenomenon.

Vedic astrology is based on following five factores:

1. The planets- In astrology five planets mercury, venus,mars,jupitor, saturn revolve in elliptical orbits around the sun. In astrology uranus ,neptune and pluto find no place.But the moon and the two shadaowy points known as rahu and ketu, which are the moon's nodes are equivalent to planets. They are not physical bodies but are mathematically calculated sensitive points of intersection of the orbits of the sun and moon.

2. Zodiac- the zodiac is divided into twelve equal partsof 30 degrees each which are called the rashis of the zodiac. These are namely aries, taurus, gemini, cancer, leo, virgo, libra, scorpio, sagittarius, capricorn, aquarius and pisces.

3. Stars or nakshatras- The entire zodiac has been divided into 27 equal parts of 13 degrees and 20minutes each known as nakshatra or asterism or a constellation. Every constellation has been assigned a planetary ruler. Ketu is the ruler of the 1st constellation starting from 0 degree aries and then the rulership of venus, sun, moon, mars, rahu,jupitor, saturn and mercury follows in this sequence till the end of the sign cancer. the same sequence starts with leo.

4. lagna- in agtrology, the 1st house starts from lagnapoint. The lagna or the ascendent is the rising sign in the eastern horizon at a particuler epoch. The is dependent on the rotation of the earth on its axis and so it is dependent on the sidereal time of a place at a given moment or epoch. It is the point of intersection of the ecliptic at a given time with the horizon of a place.

5. The houses- There are 12 houses. The sign where the lagna falls is known as the 1st house or lagna. The next sign is second house, next the third and so on. Zodiac is constantly moving and all the 12 signs get en opportunity to become lagna in 24 hours comprising a day.