AstraLinkGlossary
Conjunction in astrology: when two planets fuse at 0°
A conjunction is the tightest relationship two planets can have: they sit at the same degree of the zodiac and act as one. It is the first and strongest of the major aspects, and its meaning shifts entirely with the planets involved. Here is what a conjunction is, how to find one in your chart, and what the common pairings feel like.
A conjunction is a major aspect formed when two planets occupy the same degree of the zodiac, roughly 0° apart. Their energies blend and amplify each other, acting as a single force. Whether that force feels harmonious or tense depends entirely on which planets are joined.
What is a conjunction?
A conjunction is two planets at the same degree of the zodiac — about 0° apart — fused into a single voice. It is the first of the five major aspects (aspects are the angles planets make to each other): conjunction 0°, sextile 60°, square 90°, trine 120° and opposition 180°. It is usually the loudest one in a chart, and its glyph is ☌.
Unlike the other aspects, a conjunction is neither "easy" nor "hard" on its own. It simply blends and intensifies whatever it touches. Two planets sitting together stop behaving like separate parts of you and start acting as one unit — you rarely feel one without the other. The tone comes entirely from the planets: Venus with Jupiter is warm and generous; Mars with Saturn is disciplined but frustrated; the Sun with Mercury makes a quick, self-expressed mind. Astrologers allow an orb — a margin of a few degrees — so planets within roughly 8° for the Sun and Moon, or 5–6° for the rest, still count as conjunct, growing stronger the closer they sit to exact.
How to find a conjunction in your chart
On the wheel, conjunct planets sit side by side, almost stacked at the same spot. Pull up a chart — the free birth chart calculator here draws the aspect lines for you, and the AI reading lists your "strongest aspects", where tight conjunctions usually sit near the top. Look for two glyphs crowded together at a similar degree, most often in the same sign.
A few refinements. When the two planets are close in degree but fall either side of a sign boundary (say 29° Aries and 1° Taurus), it is an out-of-sign or dissociate conjunction — they still merge, but through slightly mismatched styles. Three or more planets conjunct in one sign or house form a stellium, a concentrated pile-up of energy in one life area. And a planet conjunct the Sun within about 17 arcminutes is cazimi, "in the heart of the Sun" — a rare, super-charged conjunction; a little farther out and it is instead "combust", overwhelmed by the Sun's glare.
Why conjunctions matter, with examples
Conjunctions matter because they mark your most defining themes — and because transiting planets crossing them light those themes up. In a birth chart, a conjunction shows two forces you were born running together. The Sun conjunct the Moon is a New-Moon birth: will and instinct point the same way, focused but with less inner contrast. Venus conjunct Mars fuses affection and desire, so love and pursuit tend to move as one. Mercury conjunct Saturn in, say, the 3rd house gives a careful, structured, sometimes self-doubting thinker who says less but means it.
The planets decide the flavour completely. Jupiter conjunct your Ascendant tends to feel expansive and lucky; Saturn conjunct that same Ascendant feels heavier and more serious, even though the angle is identical. In the sky, "great conjunctions" of Jupiter and Saturn happen about every 20 years — the last at 0° Aquarius in December 2020 — and astrologers read them as markers of long social cycles.
Conjunctions also drive timing. When a transiting planet meets one of your natal planets — Saturn crossing your natal Sun, for instance — that placement gets switched on, for better or worse. AstraLink's Cosmic Simulator flags these live (for example "Moon conjunct Uranus"). For the exact date of a conjunction happening now, check the live calendar in the app rather than guessing at it.
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Frequently asked questions
What does a conjunction mean in astrology?
A conjunction means two planets sit at the same degree of the zodiac, roughly 0° apart, so their energies merge and act as one force in your chart. It is the strongest major aspect. It is not automatically positive or negative: the meaning comes from the planets involved, from warm pairings like Venus and Jupiter to demanding ones like Mars and Saturn.
What is a good orb for a conjunction?
Orb is the margin of degrees within which an aspect still counts. For a conjunction, most astrologers allow up to about 8° for the Sun and Moon and roughly 5 to 6° for the other planets, though some prefer tighter orbs. The closer the two planets are to an exact 0°, the stronger and more defining the conjunction feels; a 1° conjunction is far louder than a 7° one.
Is a conjunction a good or bad aspect?
Neither by default. A conjunction is a blending, amplifying aspect, so it takes on the character of the planets it joins. Venus conjunct Jupiter is generally warm and fortunate; Mars conjunct Saturn can feel blocked or disciplined; Saturn conjunct the Sun is serious and weighty. Rather than good or bad, read a conjunction as intense and inseparable — two forces you experience together, for better and worse.
What does the Sun conjunct Moon mean?
The Sun conjunct the Moon marks someone born near a New Moon, with the Sun and Moon in the same sign and degree. Identity and instinct point the same direction, which brings focus and a strong sense of self, but less built-in contrast to balance it. These people often pour themselves fully into whatever sign and house the conjunction sits in, and tend to benefit from seeking out perspectives beyond their own.
What is the difference between a conjunction and a stellium?
A conjunction joins two planets at the same degree. A stellium is three or more planets conjunct or gathered in a single sign or house — essentially a super-conjunction. A stellium concentrates a large amount of energy into one area of life, making that sign or house a dominant theme in the chart. You can read a stellium as several overlapping conjunctions working together.
How do I find my conjunctions?
Cast your birth chart with your date, time and place, then look for two planet glyphs sitting close together at a similar degree, usually in the same sign. The free birth chart calculator here draws the aspect lines and the AI reading lists your strongest aspects, where tight conjunctions typically appear first. A birth time makes the house placement, and therefore the interpretation, far more precise.
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AstraLink content is written by our editorial team, reviewed for astrological accuracy, and refreshed as the sky moves. Interpretations are for reflection and entertainment; they are not medical, legal or financial advice.