Wondering why it’s so much fun with them?

Are Aries and Gemini compatible?

Aries and Gemini are a sextile: fire and air, cardinal and mutable, two signs apart on the zodiac wheel. Astrologers count the sextile as a friendly, harmonious angle. That is the Sun-sign answer, shared by everyone born under these signs. The personal answer sits in Venus, Mars, the Moon and the descendant.

You're here because of someone.

The Sun signs say easy. Two whole charts say far more.

Your card is worked out from the day, the minute and the place you were born, not from a sign you share with a twelfth of the planet.

Every Aries and every Gemini reads this page. Only your card knows you.

Find out your true compatibility.

Print my card$9.95 + tax Gift them a ticketand find out theirs

Admit one Aries Fire · Cardinal Mar 21 – Apr 19

Admit one Gemini Air · Mutable May 21 – Jun 21

⚹︎ Sextile · 60°Fire + air · cardinal + mutableHarmonious, in Ptolemy’s terms

What it is: synastry, the art of comparing two charts

Comparing two people's charts has a name: synastry. Astrologers lay one chart over the other and look at the angles between the two sets of planets, the same angles the old books use inside a single chart.

Sun-sign compatibility is the shortcut version. It compares only the two Suns, and the angle between them is the aspect: four signs apart is a trine, two apart a sextile, three apart a square, six apart an opposition. Ptolemy called the trine and the sextile harmonious, and the square and the opposition disharmonious. ¹

Elements describe temperament (fire, earth, air, water) and modes describe pace (cardinal starts, fixed holds, mutable adapts). A pair can share one, both or neither. Aries and Gemini share neither.

Full synastry goes much further: whose Venus lands on whose Moon, where one person's planets fall in the other's houses, how the two descendants line up. Ptolemy himself compared the Sun and the Moon of both charts, not just the Suns. That is why the same Aries can get on beautifully with one Gemini and not at all with another. ²

Why do Aries and Gemini click?

The traditional portrait: the same for every Aries and every Gemini.

Aries in love

Aries, the old books say, falls first and fast. The pursuit is most of the thrill: the bold message, the surprise trip, the argument that turns into a kiss. Traditionally an Aries in love is loyal, direct and impatient with games, and wants a partner who'll push back. Bore a Ram, the story goes, and it's out of the door before you've noticed.

Gemini in love

Gemini, traditionally, falls in love through talk. The messages at 1 a.m., the running joke, the person who can keep up. The old books give Gemini a short fuse for boredom and a long one for curiosity, and say it needs a partner who's also a friend. Go quiet on a Gemini and it'll fill the silence with someone else's conversation.

Together

Fire and air, the traditional easy draught: air feeds the flame, and the flame gives air somewhere to go. Midnight road-trip energy. Who's watching the fuel gauge?

Cardinal meets mutable. One sets the course and the other adjusts it on the way, which is either teamwork or a lot of U-turns.

Aries lights the match and Gemini has six ideas about what to set fire to. These are the two who end up in a different town from the one they planned, laughing about it in a diner at midnight. Sitting still is the hard part, and so, the old books add, is finishing anything.

Where it comes from: comparing charts, from Babylon to your phone

Era by era, with sources. More in the Reading Room.

Ancientc. 450 BCEThe Babylonian zodiac settles into twelve equal zones, the frame later comparisons of signs are built on. ³
Ancient410 BCEThe earliest known horoscopes, from Babylon and Nippur, date to this year. ³
Classical2nd century CEPtolemy's Tetrabiblos names the aspects between signs and calls the trine and sextile harmonious, the square and opposition disharmonious. ^4,1
Classical2nd century CEPtolemy's chapter on the planets' houses puts Aries under Mars and Gemini under Mercury. ¹
Classical2nd century CEPtolemy counts Aries and Gemini as masculine signs, both of them, and signs of the same kind are why he calls the sextile harmonious. ¹
Classical2nd century CEIn his chapter on marriage, Ptolemy compares two charts: the Sun and Moon of one against the Sun and Moon of the other, reading trines and sextiles between them as concord and squares and oppositions as friction. ²
Classical2nd century CEHis chapter on friends and enemies does the same with the Sun, the Moon, the rising degree and the Lot of Fortune of both people. ²
Medieval12th centuryAbu Ma'shar's introduction to astrology circulates in Latin; the University of Edinburgh holds a 12th-century copy. ⁵
1800s1890Alan Leo's Astrologer's Magazine offers its annual subscribers a free horoscope by post. ⁶
1930s1937R. H. Naylor's newspaper horoscope, begun in 1930, is organised by the twelve sun signs. ⁷
1970s1978Linda Goodman's Love Signs is published by Harper & Row. ⁸
1980s–90s1980–1999Chart services run by computer arrive: Astrodienst in Zürich sells birth charts from 1980 and goes online in 1996. ⁹
Today202430% of US adults consult astrology, tarot or a fortune teller at least yearly, mostly for fun, according to Pew Research Center. ¹⁰

Worked out, not guessed

Aries is sign 1 of 12 and Gemini is sign 3: two signs apart, 60°. Sextiles always share the same polarity: fire with air, or earth with water. Of the 78 possible sun-sign pairings, 12 are sextiles.
Venus never gets more than about 47° from the Sun, so an Aries's Venus is in one of five signs (Aquarius, Pisces, Aries, Taurus or Gemini) and a Gemini's in one of five (Aries, Taurus, Gemini, Cancer or Leo). Which one is a matter of the year and the day.

If it’s always fun, why does it never get serious?

The Sun can’t answer that. These four can, and your card reads every one of them.

Venus · how you love

How do you love, and how do they want to be loved?

That's Venus. It never strays far from the Sun, so an Aries's Venus can only sit in Aquarius, Pisces, Aries, Taurus or Gemini, and a Gemini's Venus can only sit in Aries, Taurus, Gemini, Cancer or Leo. Two people with the same sun sign can want completely different evenings.

Your card reads your Venus.
Mars · what you want

Who’s going to stay put long enough to finish something?

That's Mars: desire, temper, the way you chase what you're after. It can sit in any of the twelve signs, so two Geminis born a season apart can want, and fight about, completely different things.

Your card reads your Mars.
The Moon · what you need

Why do they feel like home one day and a stranger the next?

That's the Moon: what you need when the door's shut and the day's gone wrong. It changes sign every two and a half days. If their Moon falls in your sign… well.

Your card reads your Moon.
The descendant · who you’re drawn to

Why do you keep falling for the same type?

That's your descendant, the edge of the seventh house: the sign setting in the west at your birth minute. Tradition reads it as the partner you keep noticing. It needs your birth time and place.

Your card reads your rising sign and your descendant.