Astrology does not say a certain event is going to happen. It only indicates that there is a probability in certain event happening. Therefore, there is no certainty that the events we discuss here must happen.
Astrology at high levels is a mastery of its particular science and the intuitive arts. As the earliest known ordering of existence, long before recorded history, it's been called the "Mother of all Sciences."
Astrology is the study of patterns and relationships. It contains both the idea of an organised body of knowledge of the cosmos, along with the way the stars "speak" to us, or give meaning to our lives.
Astrology in modern times is not seen as being a very credible science. Astrology has always fascinated people since ages.