Calculate your Zodiac Sign | Discover your Sun Sign

Complete Guide to the Zodiac Sign

Your Sun sign represents your essence, vital force, and core identity according to the psychological astrology tradition pioneered by Liz Greene. With our free Sun sign calculator, you simply enter your birth date, time, and place to discover your exact zodiac Sun position. The tool is free, requires no login, and computes the precise degree of the Sun in your natal chart, which is especially useful for people born on cusp dates between two signs. Stars.expert runs Swiss Ephemeris on top of NASA JPL DE441, the same evidence-based astrology engine used by Robert Hand and modern western practitioners in the Project Hindsight lineage, delivering ±0.001 arcsecond accuracy.

The 12 Signs of the Zodiac

The Zodiac is divided into 12 signs, each with unique characteristics. Fire signs (Aries, Leo, Sagittarius) are energetic and passionate. Earth signs (Taurus, Virgo, Capricorn) are practical and stable. Air signs (Gemini, Libra, Aquarius) are intellectual and communicative. Water signs (Cancer, Scorpio, Pisces) are emotional and intuitive.

Sun Sign vs Birth Chart

The Sun Sign is just the tip of the iceberg. For a complete understanding of your astrological personality, you also need to consider the Moon (your emotions), the Ascendant (how you appear to others), Mercury (how you think), Venus (how you love) and Mars (how you act).

Cusps and Transition Dates

If you were born near the end or beginning of a sign, you might be 'on the cusp'. Our calculator uses precise astronomical dates to determine your exact sign, even if you were born on a transition day.

Explore more: Discover your rising sign and your moon sign.

Frequently Asked Questions

What is the Sun sign?▼

Your Sun sign is the zodiac constellation where the Sun was positioned at the moment of your birth. It represents your essential self, vital force, conscious ego, and the archetypal energy that drives your personality. In Liz Greene's psychological astrology, the Sun symbolizes the hero's journey toward individuation, the core identity that you spend your lifetime developing and expressing through creative self-realization.

Do I need my exact birth time?▼

For the Sun sign alone, exact birth time is not strictly required because the Sun moves slowly along the zodiac, taking about thirty days per sign. However, if you were born on a cusp date around the 20th to 23rd of any month, the precise time becomes essential to determine whether the Sun had already moved into the next sign or was still in the previous one when you arrived.

What about cusp signs?▼

If you were born on a cusp date, for example September 22 between Virgo and Libra, your true Sun sign depends on the exact time and location of birth. Our calculator accounts for longitude, latitude, and time zone to determine the correct sign. There is no such thing as being two signs at once: the Sun occupies one specific zodiac position at any given moment in time.

Is the calculator really free?▼

Yes, calculating your zodiac Sun sign is completely free and requires no registration, subscription, or credit card information. You instantly receive your sign, exact degree, element, modality, and a brief interpretation. The service uses professional astronomical ephemeris data and delivers the same accuracy as tools used by certified astrologers, ensuring scientific reliability in all planetary calculations.

How reliable is the calculation?▼

Our Sun sign calculator uses Swiss Ephemeris, the professional standard adopted by astrologers and astronomers worldwide, with precision down to the arc second. The data follows standards recognized by the ISAR, the International Society for Astrological Research. Time zone conversion is automatic for any birthplace, guaranteeing correct and verifiable results anywhere on Earth, including historical time changes and daylight saving adjustments.

Does it match newspaper horoscopes?▼

Generally yes, but with greater precision. Newspaper horoscopes use fixed standard intervals such as March 21 to April 20 for Aries, while the actual sign change varies by several hours each year. Our calculator uses the true Sun position for your specific date, which is particularly important for births close to the transition dates between zodiac signs, where standard tables can be inaccurate.

Free Sun Sign Calculator: Discover Your Zodiac Sign Identity

Complete Guide to the Zodiac Sign

The 12 Signs of the Zodiac

Sun Sign vs Birth Chart

Cusps and Transition Dates

Frequently Asked Questions

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