Are you sure that everything told by the scientists is correct? Before Galileo, scientists used to say that the earth is the centre of the universe and the Sun and other stars are revolving round the earth. After Galileo, the same scientists said that the Sun is the centre of our solar system and the earth and other planets are revolving round the Sun. The point is science is at infant state. It should grow to understand Astrology which is a super science. You can see some interesting discussion on this at Astrology and science

Astrology deals with the behavior of the human beings and the results of his actions. Since the life of a human being is very complex, decoding and understanding the influence of planets and stars is also very complex. Astrology provides very accurate picture of a human being’s life, but only a competent Astrologer can understand and interpret the picture correctly. If predictions go wrong, we cannot blame Astrology. We should blame the Astrologer.

Why not? Since your present actions are mere reflections of your past deeds, and the future depends on your present actions, there is always a connection between past, present and future. By erecting the horoscope of a person, an Astrologer can understand his past, present and future. Even Astrology can tell you about your previous birth.