Astrology is the study of light as seen from Earth in the cosmos. According to Vedic culture, the light falling on Earth from various sources like the Sun, the Moon, the planets and even the stars cause certain impacts on the physical and psychological existence of human beings. Astrology is the study of these effects and using them to predict the future of a person. For this, a horoscope is used which is the marking of the positions of the various cosmic bodies during the time of birth of the person. 

As such, Vedic astrology is believed to be around 5000 years old based on radioactive tests conducted on the earliest texts referring to Vedic astrology. However, the basis of Vedic astrology is Vedas. Vedas are information 'as received' from a higher source. This information was passed on from one generation to the next through oration. Scripts representing these sounds and words were developed at a much later date. This means the antiquity of Vedic astrology is as old as the history of human civilization itself.

A horoscope is an ancient form of birth certificate. In the horoscope of a person, the position of the various cosmic bodies relevant in Vedic astrology is noted down along with the time and place of the birth. From the data in the horoscope, various life predictions on different areas of life can be made like wealth, career and especially marriage. A horoscope is the only document in human history which can make accurate predictions on matters of love and romance.

There are many kinds of astrology varying from region to region. The differences arise from the basic principles used in astrology to the different fields of life in which the principles of astrology are applied. Based on the principles used, Astrology can be broadly divided into Western Astrology and Vedic Astrology. Based on the applications, the main kinds of astrology are Natal Astrology, Horary Astrology, Electional Astrology, Mundane Astrology, Medical Astrology and Relationship Astrology.

Yes, Astrology predictions are generally true. But the efficiency will vary from astrologer to astrologer. Generally, a good astrologer will get 70-80 per cent of the predictions correct. Online astrology websites and services have witnessed a rapid growth in popularity as of late. Online horoscopes and other astrology reports, such as those available from Acko Astro, are generated using specialized software which makes them immune to human error and bias.