What are the main differences between astronomy and astrology?

In astrology (dating back to ancient times), only heavenly phenomena and movements visible to the naked eye are considered. Hence the planets beyond Saturn that can only be seen with telescopes do not figure in astrology. Astrology also places great importance on the visual pattern (constellations) of the heavenly objects in the night sky, whereas they are of least significance to astronomers. The heavenly objects recognized by astrologers also include objects like “Rahu” and “Ketu” considered non-existent by astronomers. The movements of the heavenly objects are believed by astrologer’s manner, whereas according to astronomers such a contention has no scientific basis and any astrological correlations are considered purely coincidental.