Astrology is a prediction.A good prediction.looking at the stars and predicting people behavior.It is a proven fact that moon and planet moments can affect people mind state.So if you live unconsciosly you have tendencies to go in a particular direction.Be angry,irritability,getting with accidents etc.But if you live mindfully,consciously what can the planets do for you.So the decision is yours whether you let planets to drive your life or you take the steering wheel to your hand.
This is what buddha said too.If you do something consciously with a good thought what to do with the planets.Only if you live unaware and blindly you have tendencies to go wrong directions.