Astrology is a scientific study and application of the language of the heavenly bodies(planets and stars). These heavinely bodies are determined on the basis of astronomy and mathematics, are mapped in the form of a horoscope.
The main factors affecting the horoscope of any individual are Date of birth, Place of birth and exact time of birth.
In Hindu Astrology, this system has been explained as space time connection.
Vedic Astrology is the ancient Indian science of astrology perfected over 7000 years ago. Earliest mentions of Vedic astrology come in the Vedas, preceded by details of this divine science being revealed by lord Shiva to his spouse goddess Parvati.

Amongst other amazing aspect about Vedic astrology, the most impressive is the Dasa System (found only in Hindu Astrology) where predetermined periods are designated to the nine planets and a detailed interpretation is available at birth.
In Vedic astrology it is assumed that nothing in the universe is stationery.

Vedic astrology has been perfected & interpreted by great astrologers like Vaharamihira, Sage Jaimini, Kalidas.

Besides the Nakshtra interpretation is the most superior and sophisticated method of interpretations.

The zodiac forms the reference point for fixing up position of any planet or star in the sky. Since it encircles the earth, it is comprised of 360 degrees. The twenty-seven nakshatras being evenly distributed on it each having the span of 13°20’ arc. The various nakshtras are numbered from one to twenty-seven.
Apart from it Vedic astrology recognises nine grahas. They are the Sun, the Moon, the Mars, Mercury, Jupiter, Venus, Saturn, Rahu & Ketu. Of these the Sun is star, the moon is a satellite of the earth, Rahu and Ketu are mere mathematical points on the zodiac. While the remaining ones are planets.
When the zodiac is divided into twelve equal parts, each such part has an extension of 30 degrees of the arc. Such a division is called Rashi or Sign .
Each sign has a certain specific influence of its own. All the planets as they travel around each zodiac sign, exert an influence according to their separate nature and in accordance with the quality of aspect which they form.