Astrology is harmful

 Rambam (Letter on Astrology) The reason that we lost our kingdom and the Temple was destroyed and we arrived at our present condition is the result of our ancestors sinning. This is because they found many astrology books which are essentially avoda zara…and they thought they were magnificent science which would be very helpful. Consequently they did not study warfare and military strategies but thought that astrology alone would save them. That is why the prophets described them as fools and idiots…