While Sri Mahalakshmi astrology Astrology based on the birth date is known as natal astrology or birth chart astrology. It involves creating a natal chart, also called a birth chart or horoscope, which is a personalized map of the celestial bodies' positions at the exact time and place of a person's birth. This chart is then used to provide insights into various aspects of an individual's life, including personality, relationships, career, and more.