Sign 3 of 12 · Tropical zodiac
Gemini
Gemini is a mutable air sign, traditionally ruled by Mercury. Adaptation through ideas. Comparing accounts, asking questions and exchanging information keep a subject moving.
Find Gemini in my chart- Element
- Air
- Modality
- Mutable
- Traditional ruler
- Mercury
- Zodiac longitude
- 60° to <90°
Read Gemini through the planet
A sign describes a style of expression. The planet supplies the subject. A Sun reading concerns identity; a Moon reading concerns emotional needs and familiar responses.
Sun in Gemini
Sun in Gemini is associated with finding purpose through learning and exchanging ideas. Explaining a subject to someone else can help you discover your own position. Curiosity becomes harder to use when every new question interrupts unfinished work.
Read the full Sun in Gemini guideMoon in Gemini
A Gemini Moon is associated with understanding feelings by putting them into words. Talking through an upsetting conversation can help separate what happened from what you assumed it meant. More explanations can also delay saying what you need.
Read the full Moon in Gemini guideGemini rising
The Ascendant describes the zodiac degree rising at the eastern horizon. In a reading, it concerns personal presence and the approach to unfamiliar situations. A birth time and location are needed to calculate it.
With Gemini rising, Mercury is the traditional chart ruler. Its sign and house connect the rising-sign interpretation with another part of the chart.
Find my chart ruler and its placementA worked comparison
The same sign, different questions
A Gemini Sun concerns developing a voice through inquiry. A Gemini Moon concerns what happens when an experience needs words. A person can feel certain about a chosen goal and still need to discuss several interpretations of a difficult moment. That difference is not an inconsistency in the chart.
These are illustrative interpretations, not facts inferred about you.
Every planet in Gemini
Choose the placement listed in your birth chart. Each guide explains its meaning and how houses or aspects change the reading.
Find the rest of the context
A sign label is one part of a placement. Read it alongside the planet, house and aspects. These describe different chart relationships.
The degree range, with an example
A longitude of 75° is 15° Gemini. At exactly 90°, the next sign, Cancer, begins.
Every tropical sign spans 30°. The signs are equal coordinate divisions; the astronomical constellations have different boundaries.
Read the calculation methodsPlacidus houses with Gemini rising
The Ascendant degree in Gemini starts the 1st Placidus house. Its end and the remaining cusps depend on the exact birth time and location.
Read the calculated house list rather than counting one sign per house. A sign can appear on consecutive cusps or sit inside a house without starting one.
Read Placidus boundaries and house topicsRelated signs and chart angles
Libra and Aquarius share the air element. Sagittarius is opposite Gemini in zodiac order.
Matching degrees in opposite signs are 180° apart. Exact degrees and the permitted orb decide whether two placements form an aspect.
Sign categories do not provide a relationship score. A two-person comparison needs the placements in both charts.
Understand aspects and orbs · Compare two chartsWhen a birth time or sign boundary is uncertain
Calendar date lists are approximate. Near a Sun-sign boundary, the year and birth time can change the answer. If an uncertain birth period includes a sign change, Astriel shows the alternatives.
Unknown birth time leaves the Ascendant and houses unavailable. The available planetary signs remain in the result.
Calculate my Sun, Moon and rising signSources and reading limits
Elements, modalities and rulers are astrological conventions. They do not establish a measured personality profile or predict an event.
The symbolic explanations follow Astriel's editorial astrology reference and the linked placement guides. Worked comparisons illustrate the reading method.
Classification references: elements, modalities and traditional and modern rulerships. Degree examples follow the tropical zodiac. House teaching uses calculated Placidus cusps.
Sky calculation: apparent geocentric ecliptic of date; tropical zodiac. Ephemeris: astronomy-engine 2.1.19. Computed 2026-11-03T13:28:40.367Z.