What Are the 12 Zodiac Signs? (A Complete Reference)

Last updated: 2026-07-25

# What Are the 12 Zodiac Signs? (A Complete Reference)

The zodiac is a conceptual belt of the heavens divided into twelve equal sections, used in Western astrology to track the position of celestial bodies. Each section corresponds to a specific sign, which is determined by the position of the sun relative to the Earth at a given time of the year.

Astronomical Basis of the Zodiac

In Western astrology, the Tropical Zodiac is used. This system is based on the seasons rather than the actual positions of the stars. It is aligned with the ecliptic, which is the apparent annual path of the Sun across the celestial sphere. The zodiac begins at the vernal equinox (the first day of spring in the Northern Hemisphere), marking 0 degrees of Aries.

The 12 Zodiac Signs

Aries

• Dates: March 21 – April 19
• Element: Fire
• Modality: Cardinal
• Ruling Planet: Mars
• Archetype: The Initiator

Taurus

• Dates: April 20 – May 20
• Element: Earth
• Modality: Fixed
• Ruling Planet: Venus
• Archetype: The Stabilizer

Gemini

• Dates: May 21 – June 20
• Element: Air
• Modality: Mutable
• Ruling Planet: Mercury
• Archetype: The Communicator

Cancer

• Dates: June 21 – July 22
• Element: Water
• Modality: Cardinal
• Ruling Planet: Moon
• Archetype: The Nurturer

Leo

• Dates: July 23 – August 22
• Element: Fire
• Modality: Fixed
• Ruling Planet: Sun
• Archetype: The Sovereign

Virgo

• Dates: August 23 – September 22
• Element: Earth
• Modality: Mutable
• Ruling Planet: Mercury
• Archetype: The Analyst

Libra

• Dates: September 23 – October 22
• Element: Air
• Modality: Cardinal
• Ruling Planet: Venus
• Archetype: The Diplomat

Scorpio

• Dates: October 23 – November 21
• Element: Water
• Modality: Fixed
• Ruling Planet: Pluto (traditionally Mars)
• Archetype: The Alchemist

Sagittarius

• Dates: November 22 – December 21
• Element: Fire
• Modality: Mutable
• Ruling Planet: Jupiter
• Archetype: The Explorer

Capricorn

• Dates: December 22 – January 19
• Element: Earth
• Modality: Cardinal
• Ruling Planet: Saturn
• Archetype: The Strategist

Aquarius

• Dates: January 20 – February 18
• Element: Air
• Modality: Fixed
• Ruling Planet: Uranus (traditionally Saturn)
• Archetype: The Innovator

Pisces

• Dates: February 19 – March 20
• Element: Water
• Modality: Mutable
• Ruling Planet: Neptune (traditionally Jupiter)
• Archetype: The Mystic

Groupings: Elements and Modalities

The Elements

The four elements describe the fundamental nature of the sign's energy:

• Fire: Aries, Leo, Sagittarius (Active, expansive)
• Earth: Taurus, Virgo, Capricorn (Practical, material)
• Air: Gemini, Libra, Aquarius (Intellectual, social)
• Water: Cancer, Scorpio, Pisces (Emotional, intuitive)

The Modalities

The modalities describe how a sign expresses its energy and its relationship to time/action:

• Cardinal: Aries, Cancer, Libra, Capricorn (Initiation and start of seasons)
• Fixed: Taurus, Leo, Scorpio, Aquarius (Stability and peak of seasons)
• Mutable: Gemini, Virgo, Sagittarius, Pisces (Adaptability and end of seasons)

Historical Development

The foundations of the zodiac were established by the Babylonians around the 7th century BCE. The system was later adapted by the Greeks, who synthesized Babylonian mathematics with their own philosophical frameworks. By the Roman era, the 12-sign system was standardized into the Western astrological tradition, aligning the signs with the solar calendar.

Common Misconceptions

Constellations vs. Signs

A common misconception is that zodiac signs are the same as astronomical constellations. In the Tropical Zodiac, "signs" are 30-degree mathematical segments of the ecliptic. Constellations are actual groups of stars of varying sizes and shapes.

The Precession of the Equinoxes

Because the Earth's axis wobbles slowly over time—a phenomenon known as axial precession—the position of the sun relative to the stars shifts. As noted by NASA, this means the sun is no longer in the same constellation it was in 2,000 years ago when the zodiac was standardized. Western astrology ignores this shift by tethering the signs to the equinoxes rather than the stars.

Bottom Line Summary

The Western zodiac is a symbolic 12-part division of the ecliptic based on the Tropical system. It categorizes signs by elements and modalities to create a framework for analyzing celestial positions relative to the Earth's seasonal cycle.