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Everything You Need to Know About the Ruling Planet of Jupiter

Andrea has a background in Myers-Briggs and Western astrology. She mostly writes about relationships.

Jupiter's placement in your natal chart can tell you much about yourself.

Jupiter's placement in your natal chart can tell you much about yourself.

Basics About Jupiter as a Ruling Planet

Jupiter is the largest planet in our solar system. In Western astrology, it traditionally ruled both Sagittarius and Pisces. In modern astrology, however, Jupiter only rules Sagittarius, and Neptune rules Pisces. This article will look at how Jupiter’s influence works for both signs.

The giant planet is associated with luck, optimism, and positivity. The planet is about abundance, expansion, influence, and wealth.

Characteristics of Signs Ruled by Jupiter

  • Sagittarius is the mutable fire sign. It comes at the end of autumn. Sagittarius is known for its wild, unpredictable energy. Sagittarius types tend to have commitment issues. They want to be free and go wherever they please. This fire sign is known as the risk taker. They'll try edgy things like gambling. Sagittarius types are funny, jovial, lucky, and smart.
  • Pisces is the mutable water sign. It comes at the end of winter. Pisces is known for her empathetic and wise qualities. She can pair up with anyone in the zodiac with ease. Pisces types are searching for true love. This sign is wise—it's the last sign of the zodiac and understands all the signs that were born before it. Pisces is kind, imaginative, dreamy, considerate, intelligent, and moody.

Those who are ruled by Jupiter can see the bigger picture. They crave purpose and meaning in their lives. They're often drawn to humanitarian causes and philosophical ideas. When they can address their big vision in a tangible way, success will likely follow.

Jupiter was considered the king of the gods in Roman religion. His power was immense; his choices could influence a vast number of mortals.

How Having Jupiter as a Ruling Planet Affects People

  • Jupiter influences people's activities. The planet dictates whether people's efforts will be rewarded.
  • Jupiter encourages people to set big goals and to go after them.
  • The planet encourages curiosity and leads people to pursue their passions.
  • The planet gives definition to dreams.
  • Jupiter also inspires people to take risks.

Jupiter in Astrology



Modern = Sagittarius | Ancient = Sagittarius and Pisces






Luck, growth, optimism, happiness, goals, understanding, positivity, abundance, risk-taking.


Spends 12-13 months in each sign.

Jupiter in the Natal (Birth) Chart

Everyone in their natal chart will have a zodiac sign placed in Jupiter. You can find your natal chart online for free.

If you have Sagittarius or Pisces in Jupiter, you will have a strong amount of influence from that planet. The same applies if either of those zodiacs is in your sun sign.

Jupiter expresses how you approach generosity and tolerance. Jupiter helps people to stay calm and cope with difficult situations as they arise. The planet influences one’s spiritual growth by maintaining optimism.

In my own natal chart, Aries is in Jupiter. This means I am eager and instinctive about my goals. I like to get things moving when it comes to my dreams, and I don’t like to put dreams on hold. Jupiter also helps calm down the Aries aspect, which wants to drive things to an immediate conclusion.

  • Jupiter acts more like the element of fire, which is about energy, movement, goals, ambitions, and dreams. This may be why in modern astrology Sagittarius continues to be assigned under Jupiter while Pisces was assigned to a new planet.
  • Mars and the Sun are also considered ruling planets with the fire element.

Jupiter also expresses happiness. The planet helps attract you to what makes you feel good about yourself and what gives you a sense of responsibility. Jupiter influences your self-image. It allows you to explore yourself outside of your thoughts, senses, and emotions. It takes you directly to your desires.

When we look at Sagittarius, we notice that people born under this sign have a keen eye for knowledge. They do well in school and often don't have to work too hard at it. The mutability of Jupiter makes it easy to learn things and not feel too tied down by any one subject. A strong influence from Jupiter will push people to explore and improve their skills.

Jupiter is in transit in each sign for about 12 to 13 months. You will likely have the same Jupiter sign as someone if you were born close together.

Facts About the Planet Jupiter

Jupiter is the 5th planet from the Sun and the largest in our solar system. It is a gas giant with a mass one-thousandth that of the Sun.

  • It is two and a half times bigger than all the other planets in our solar system combined.
  • It has 79 planets. The largest moons are Io, Europa, Ganymede, and Callisto.
  • It has 4 rings.
  • It takes 11.9 years for it to orbit around the Sun.
  • The first record of Jupiter dates back to the 7th or 8th century BCE. It was recorded by Babylonian astronomers.
  • It is the fourth brightest object from Earth. The Sun, Moon, and Venus are all brighter.
  • It is one of five planets visible to humans without a telescope or other device.
  • Jupiter has the shortest day of all the planets: 9 hours and 55 minutes.
  • The planet's rapid rotation flattens it slightly, giving it an oblong shape.
  • Jupiter has clouds made of ammonia crystals, sulfur, and mixtures of the two.
  • The Great Red Spot is a huge storm that has lasted for at least 350 years. Three Earths could fit inside the storm.
  • Jupiter's interior is made of rocks, metals, and hydrogen compounds.
  • Its moon, Ganymede, is the largest moon in the solar system. It is bigger than Mercury.
  • The rings are made up of dust particles. Scientists believe the particles come from Jupiter's smaller worlds. The dust came off during impacts from incoming comets and asteroids.
Jupiter was celebrated in Rome during the Republican and Imperial ages. He was the most important god. His decision was final. People regularly worshiped him, and Roman consuls gave oaths to him.

Jupiter was celebrated in Rome during the Republican and Imperial ages. He was the most important god. His decision was final. People regularly worshiped him, and Roman consuls gave oaths to him.

Jupiter in Roman Mythology

Jupiter is named after the king of gods in Roman religion. Jupiter in Greek mythology was Zeus, the god of thunder.

The Mesopotamians saw Jupiter / Zeus as the god Marduk and patron of the city of Babylon. Germanic tribes saw the planet as Donar, or Thor.

Jupiter or luppiter comes from the Proto-Italic djous, meaning day, sky. Jupiter is sometimes referred to as Jove.

Jupiter was the chief deity of the Roman state religion throughout the Republican and Imperial eras until Christianity became the dominant religion.

According to myth, he negotiated with the second king of Rome to establish laws, principles, and conduct around offerings and sacrifices.

Important Notes About Jupiter

  • He was venerated in the Imperial cult of ancient Rome.
  • His symbols include lightning bolts, eagles, and oak trees.
  • Parents: Saturn and Ops.
  • Siblings: Juno, Ceres, Vesta. In Greco-Roman: Pluto and Neptune.
  • Consort: Juno.
  • Children: Mars, Vulcan, Bellona, Juventas.
  • The Ides (the midpoint of the month with a full moon) were sacred to Jupiter. Important festivals, ceremonies, and other events were held on the Ides. Julius Caesar was killed on the Ides of March.
  • Wine festivals and viniculture were devoted to Jupiter. Wine was considered the king's drink. It has the power to inebriate and exhilarate.

Jupiter likely began as an aerial god. His most well-known symbol is the thunderbolt, and his primary sacred animal was the eagle. The eagle held precedence over other birds in auspices. The bird was also a common symbol in the Roman army.

As the sky-god, Jupiter was witness to oaths, the fundamental action which justice and government depend upon.

In the Capitoline Triad, he was the central guardian of the state with Juno and Minerva. Jupiter was adapted from Zeus. His brothers were also adapted from Greek myth: Neptune as Poseidon and Dis Pater as Hades.

Jupiter ruled the sky, Neptune the waters, and Dis Pater the underworld.

The Romans believed that Jupiter gave them supremacy because they had honored him more than any of the other peoples on the planet. He was the personification of divine authority. His image was everywhere in the Republican and Imperial Capitol.

Jupiter is essentially the same god as Zeus. The Romans borrowed from Greek mythology. They mostly just changed the names of gods.

Jupiter is essentially the same god as Zeus. The Romans borrowed from Greek mythology. They mostly just changed the names of gods.

Consuls swore their oath of office in Jupiter's name. They honored him annually at the Capitol in September.

  • Consuls offered him a white ox with gilded horns.
  • Generals surrendered their victory tokens at the feet of his Capitol statue.
  • Ox, lamb, and wether were sacrificed to Jupiter, often on the Ides of January. The animals were required to be white.
  • During one of the Punic Wars, Jupiter was offered every animal born that year.
  • In his temple at Capitoline Hill, there was the Jupiter Stone. It was the spot where oaths could be sworn.

Interesting Tidbits From Roman Times

Rome was first ruled by kings. The monarchy was abolished with the establishment of the Republic. Those suspected of harboring ambitions to revive the monarchy were punished. People deemed as traitors were often executed.

Throughout his reign, King Tullus held hostility toward religion. He wasn’t into religious ceremonies, rites, or piety. Tullus destroyed Alba Longa and deported its inhabitants to Rome. Legend has it that omens followed. Some argued a rain of stones occurred at Alban Mount because the deported Albans didn’t do their ancestral rites linked to Jupiter.

A plague followed, and then the king himself got sick. Tullus broke down and gave in to religion. He found a book by King Numa recording a secret rite to summon Jupiter. The king performed the rite, but he did it wrong. Jupiter threw a thunderbolt, and it burned down the king's house and killed him.

The Romans took over Jerusalem in a decisive siege starting in AD 70. Aelia Capitolina was established from CE 130-324. A temple to Jupiter Capitolinus was created in the place of the destroyed Temple of Jerusalem.

This article is accurate and true to the best of the author’s knowledge. Content is for informational or entertainment purposes only and does not substitute for personal counsel or professional advice in business, financial, legal, or technical matters.

© 2021 Andrea Lawrence