Gemini, called Mithuna in Sanskrit, is the third of the 12 rashis, the zodiac signs of Vedic astrology. It spans 60 to 90 degrees of the sidereal zodiac, the star-anchored zodiac that Jyotish uses. Mithuna is a dual air sign ruled by Mercury. Its name means a pair or couple, and it maps to the arms of the Kala Purusha, the cosmic body laid across the sky. No planet is exalted or debilitated here. The classical reading of the sign is quick, curious, and connective: wherever Gemini falls in a chart, that part of life runs on words, ideas, skills, and the company of other minds.

This page goes deep on Mithuna alone: its keys, its lord, its nakshatras, and how it reads as a Moon sign or rising sign. For the system itself, how the 12 signs divide the sky and what elements and modalities mean, start with the guide to the 12 Vedic zodiac signs.

Mithuna at a glance

The quick facts first, from the standard scheme of the Brihat Parashara Hora Shastra, each unpacked in the sections below.

Attribute Mithuna (Gemini)
Position 60°00′ to 90°00′ of the sidereal zodiac
Order 3rd of 12
Element (tattva) Air (vayu)
Modality Dual (dwiswabhava)
Ruler Mercury
Symbol A pair: classically a couple with mace and lute
Body part (Kala Purusha) The arms
Polarity Odd sign, active
Exalted here None of the seven classical planets
Debilitated here None of the seven classical planets
Nakshatras contained Mrigashira (padas 3 and 4), Ardra, Punarvasu (padas 1 to 3)

The pair, the arms, and the sign of two minds

Mithuna means a pair or a couple, and the Brihat Jataka pictures the sign as a man and a woman together, he holding a mace, she a lute. The image encodes the sign's doubleness: strength and art, logic and play, two natures in conversation inside one stretch of sky. Western tradition draws the same doubleness as twins.

As the third sign, Gemini maps to the arms of the Kala Purusha, the cosmic body. The arms reach, gesture, write, and craft, which is why the classics tie this sign to skill, speech, correspondence, and every kind of exchange.

The Sun passes through sidereal Gemini from about 15 June to 15 July, a day either way depending on the year, the month marked by Mithuna Sankranti in Indian solar calendars.

Dual air: the two keys to Mithuna

The classics describe each sign by element and modality. Mithuna is air by element, the tattva of mind, words, and the space between people, and dual by modality, the mode that adapts and completes. Dual air is thought in motion, and most of the sign's character follows from that phrase.

Gemini shares the air element with Libra and Aquarius, the air triangle of signs with a natural mutual sympathy. It shares the dual mode with Virgo, Sagittarius, and Pisces, the four bridging signs that close one season and open the next. Dual signs hold two tendencies at once by design, which in Gemini becomes versatility: several skills, several interests, several conversations, all running in parallel.

Mercury, the lord of Mithuna

The ruler of Gemini is Mercury, the planet of speech, intellect, calculation, trade, and wit. The sign is the home and the planet sets its tone, so Gemini themes are Mercurial through and through: fast uptake, light touch, a love of wordplay, and an instinct for connecting one thing to another.

Mercury rules two signs, Gemini and Virgo, and the pair shows the planet's two faces. Gemini is Mercury's airy side, the talker and connector; Virgo is its earthy side, the analyst and craftsman, and Virgo additionally holds Mercury's exaltation. A planet in its own sign is like a king in his own palace, so Mercury placed in Gemini is strong and at ease, giving clear speech and a nimble mind without strain.

Which planets are strong or weak in Gemini?

Gemini hosts neither an exaltation nor a debilitation among the seven classical planets, one of the few signs with no such point. Strength here comes from ownership instead: Mercury in its own sign is the placement the classics single out, and every other planet takes on the sign's quick flavour.

The visitors are still worth reading. Jupiter in Gemini turns wisdom toward teaching and writing. Mars here argues as readily as it acts. Venus turns charm verbal, and Saturn gives the rare gift of disciplined attention inside a restless sign. The shadow planets Rahu and Ketu own no sign at all; they colour whatever sign they occupy, and their special placements vary from text to text, so sign-level rules are read for the seven.

The nakshatras inside Gemini

A little over two nakshatras, the 27 lunar mansions, fit inside every sign. Gemini contains the second half of Mrigashira, the whole of Ardra, and the first three quarters of Punarvasu. A planet in Gemini always occupies one of these three, and the nakshatra refines the sign-level reading.

Nakshatra Degrees of Gemini Nakshatra lord
Mrigashira (padas 3 and 4) 0°00′ to 6°40′ Mars
Ardra 6°40′ to 20°00′ Rahu
Punarvasu (padas 1 to 3) 20°00′ to 30°00′ Jupiter

Mrigashira, the searching deer, begins in Taurus and finishes here, carrying its curiosity into Gemini's first degrees. Ardra, the storm star of Rudra, sits wholly inside the sign and gives the middle of Gemini a sharper, more turbulent intelligence. Punarvasu, the star of return and renewal, opens in late Gemini and crosses into Cancer. Each full profile is linked from the 27-nakshatra map.

Gemini as a Moon sign

In everyday Vedic practice your rashi means your Moon sign, and a Gemini Moon describes a mind built for language. Thought arrives as conversation, inner and outer; learning is fast, humour is quick, and silence is the one condition the mind finds hard to keep.

The Brihat Jataka sketches the Gemini Moon as witty, persuasive, fond of music and the arts, skilled in many crafts, and good company. The cost of the speed is scatter: many starts, fewer finishes, and a restlessness that mistakes novelty for progress. The traditional counsel works with the grain rather than against it, giving the mind genuinely demanding material, study, languages, trade, or craft, so the appetite for variety becomes range instead of noise. The condition of Mercury in the chart shows which way it goes.

Gemini rising, and the sign opposite

If Gemini was rising in the east at your birth, it is your lagna, or rising sign, and Mercury rules your chart. The classical sketch of a Gemini lagna is a youthful, articulate, sociable person who reads rooms quickly, juggles several pursuits, and stays mentally young at every age.

Across the wheel sits Sagittarius, and the axis between them runs from information to meaning: Gemini gathers facts and connections, Sagittarius asks what they are for. Opposite signs are partners, each holding what the other lacks, so the Gemini chart matures by borrowing Sagittarius's long view, letting one big question organise its thousand small ones.

How much of this page applies to you depends on whether Gemini holds your Moon, your lagna, or a single planet. A free birth chart shows every placement, and the neighbouring profiles of Taurus and Cancer show how differently the sky reads one sign to either side.