Vedic astrology is the modern name for an ancient system of astrology known in Sanskrit as "Jyotish" - "Jyoti" being light and "isha" being lord. Jyotish thus translates into "the Lord of Light" or "the Knowledge of Light". Modern science now confirms that all matter/physical universe is based upon light and its interplays which would make Jyotish "the science of light".
Vedic Astrology is a science dating back to more than 5000 years. Its earliest origins can however be traced back to the beginning of the manifest Universe. It passed down through the ages as an orally transmitted knowledge and formed an important part of the Vedas, one of the prime manuscripts containing the spiritual tradition of India.
Vedic Scriptures known as 'Vedas' describe Jyotish as 'the Eye of the Vedas'. The world is always there but we cannot see it without our eyes - in the same way Jyotish is the light which illumines the universal knowledge encapsulated in the Vedas.
The Ancient Sages who according to Vedic Mythology are the mind born sons of Brahma (one of the Trinity, the Creator of the Universe in Vedic Mythology), were privy to the secrets and functionings of the Universe and transmitted their knowledge orally to their disciples.
The instructions of one such Sage by the name of Parashara were put into text around 3000 years ago. These writings form the backbone of present day Vedic Astrology.
Vedic Astrology is thus the earliest form of Astrology and is a system that has changed very little over the course of time. Its precision and accuracy as a divination science is unrivalled even today.