To the Ancient Greeks who learned from the Babylonians, the earliest astronomers/astrologers,[citation needed] this group consisted of the five planets visible to the naked eye and excluded Earth, plus the Sun and Moon.
The ancient Babylonians, Greeks, Persians, Romans, Medieval Christians, and others thought of the 7 classical planets as gods and named their 7 days of the week after them.
These books usually list a male and a female Titan with each planet, Cronus and Rhea with Saturn, Eurymedon and Themis with Jupiter, probably Crius and Dione with Mars, Hyperion and Theia with the Sun, Atlas and Phoebe with the Moon, Coeus and Metis with Mercury, and Oceanus and Tethys with Venus.
[25] The Moon is large enough for its gravity to affect the Earth, stabilizing its orbit and producing the regular ebb and flow of the tides.
In astrology, the Moon is associated with a person's intuition, emotions, unconscious habits, rhythms, memories, moods, instincts and their ability to react and adapt to those around them.
In medicine, the Moon is associated with the digestive system, stomach, breasts, the ovaries and menstruation (which occurs on a monthly cycle)[26] and the pancreas.
Mercury governs schooling and education, the immediate environment of neighbors, siblings and cousins, transport over short distances, messages and forms of communication such as post, email and telephone, newspapers, journalism and writing, information gathering skills and physical dexterity.
This arc is larger the farther north or south from the equator latitude, giving a more extreme difference between day and night and between seasons during the year.
In astrology, the Sun is usually thought to represent the conscious ego, the self and its expression, personal power, pride and authority, leadership qualities and the principles of creativity, spontaneity, health and vitality, the sum of which is named the "life force".
Additionally, humans depend on the sun to produce and obtain vitamin D; an important supplement aiding the body's immune system and bone health.
Both the soil of Mars and the hemoglobin of human blood are rich in iron and because of this they share its distinct deep red color.
In astrology, Mars is associated with aggression, confrontation, masculinity, the male body, the warrior, the man, courage, energy, strength, ambition and impulsiveness.
While Venus tends to the overall relationship atmosphere, Mars is the passionate impulse and action, the masculine aspect, discipline, willpower and stamina.
[33] It plays an important protecting role in using its massive gravity to capture or expel from the solar system many comets and asteroids that would otherwise threaten Earth and the inner planets.
In astrology, Jupiter is associated with the principles of growth, expansion, adventures, healing, prosperity, good fortune, and miracles.
Jupiter governs long distance and foreign travel, big business and wealth, higher education, religion, and the law.
In classical Roman mythology, Saturn is the god of seeds, crops, husbandry, and the harvest (agriculture), leader of the titans, father and founder of civilizations, social order, and conformity.
In astrology, Saturn is associated with focus, precision, nobility, ethics, the father, civility, lofty goals, career, great achievements, dedication, authority figures, stability, virtues, productiveness, valuable hard lessons learned, destiny, structures, protective roles, balance, meritocracy, conservatism, and karma (reaping what you have sown or cosmic justice) but with limitations, restrictions, boundaries, anxiety, tests, practicality, reality, and time.
It concerns a person's sense of duty, commitment, responsibility, including their physical and emotional endurance in times of hardships.
According to Sefer Yetzirah – GRA Version – Kaplan 4:13[37][non-primary source needed] "He made the letter Resh king over Peace And He bound a crown to it And He combined one with another And with them He formed Saturn in the Universe Friday in the Year The left nostril in the Soul, male and female."
Astrological interpretations associate Uranus with the principles of ingenuity, evolutions, progress, unconventional ideas, individuality, discoveries, electricity, inventions, democracy, and revolutions.
In art and literature, the discovery of Uranus coincided with the Romantic movement, which emphasized individuality and freedom of creative expression.
When it comes to medicine, Uranus is believed to be particularly associated with the sympathetic nervous system, mental disorders, breakdowns and hysteria, spasms, and cramps.
In astrology, Neptune is associated with the collective consciousness, the tenderness, the peace, the fantasies, idealism, dreams/fantasy, projections, undoing/dissolution of the status quo, artistry, empathy, sentimentality and illusion/confusion/vagueness on the way to discovering universal truths.
In art, the impressionist movement began a trend away from literal representation, to one based on the subtle, changing moods of light and color.
It is associated with absolutes, power, extremities, transformations, incredible feats, mass movements, and the need to cooperate or share with another if each is not to be destroyed.
[46] Pluto governs major business and enormous wealth, mining, surgery and detective work, and any enterprise that involves digging under the surface to bring the truth to light.
Pluto is considered by modern astrologers to be the primary native ruler of the eighth house and a higher octave of Mars that functions on a collective level.
Since the discovery of Chiron () in the 1970s, some astrologers have been casting the new "planet", although astronomers consider it a centaur (a kind of intermediate object between comet and asteroid).
[48] In the 21st century, several new planet-sized bodies, including Sedna (), Quaoar (), Orcus (), Gonggong (), Haumea (), Makemake (), and Eris (), have been discovered.