Air signs: Gemini, Libra, Aquarius
Air is associated with ideas, communication and social exchange. Gemini explores information; Libra negotiates between people; Aquarius sustains an independent vision.
Elements are symbolic categories in Western astrology. They do not measure physical composition or establish personality scientifically.
| Sign | Typical dates | Modality | Ruler |
|---|---|---|---|
| Gemini | May 21 – Jun 20 | Mutable | Mercury |
| Libra | Sep 23 – Oct 22 | Cardinal | Venus |
| Aquarius | Jan 20 – Feb 18 | Fixed | Saturn (traditional), Uranus (modern) |
One element, three modalities
Each element contains one cardinal sign (initiating), one fixed sign (sustaining) and one mutable sign (adapting). Gemini is mutable; Libra is cardinal; Aquarius is fixed. This is how the tradition distinguishes signs that share an element.
Does sharing an element mean compatibility?
The three air signs are 120° apart in the zodiac: a trine by sign. Astrology traditionally associates that geometry with ease, but a Sun-sign pairing cannot predict a relationship. Compare the actual birth charts with the synastry calculator or browse the compatibility chart.
Is my whole chart air?
A Sun sign describes one placement. Your Moon, Ascendant and planets may be in other elements. The birth chart calculator shows those placements individually.
Explore the other elements
Astrology is a symbolic and cultural tradition. The planetary positions on this site are calculated with astronomical accuracy; the interpretations describe what astrologers associate with them and are not scientifically validated predictions about personality, relationships or the future.