The advent of the telescope and the corresponding discovery of the so-called "modern planets" — Uranus, Neptune, and Pluto — completed the celestial puzzle.
For centuries, astrology was at the heart of science, medicine, philosophy, and magic. The Hermetic axiom "as above, so below" signified the belief that the vast, mysterious macrocosm of the universe reflects the microcosm of humans' experiences. The advent of the telescope and the corresponding discovery of the so-called "modern planets" — Uranus, Neptune, and Pluto — completed the celestial puzzle. Though the function of astrology has changed (it's now more frequently used to gauge romantic compatibility than to predict the fate of the harvest), today we still observe the planets as the ancient Babylonians did.