Quick answer: The Pleiades are a bright open star cluster in the constellation Taurus, known as the Seven Sisters, and their brightest star is Alcyone. In tropical astrology Alcyone now lies near 0 degrees of Gemini (around 29 to 30 degrees of Taurus). In classical lore Ptolemy gave the cluster a Moon and Mars nature, and the tradition reads it with a tender but sorrowful tone, often summarized as "something to cry about."
Of all the patterns scattered across the night sky, few are as instantly recognizable, or as quietly moving, as the small misty knot of the Pleiades. For thousands of years sailors, farmers, and poets have looked up at this tiny cluster and felt something stir. In astrology, the Seven Sisters and their lead star Alcyone carry one of the most distinctive reputations among the fixed stars: beautiful, refined, and touched with sorrow.
What the Pleiades are
The Pleiades, catalogued by astronomers as Messier 45 (M45), are an open star cluster, meaning a loose family of stars born together from the same cloud of gas. They sit in the constellation Taurus, the Bull, and form one of the most familiar naked-eye objects in the entire sky. To the unaided eye they appear as a small, hazy cluster of several closely set points of light, which is why many cultures have described them as a tiny dipper or a handful of jewels.
Their popular name, the Seven Sisters, comes from Greek myth, in which the Pleiades were the daughters of the titan Atlas and the sea-nymph Pleione. The brightest star of the group is Alcyone, named for the eldest of those sisters. As an open cluster, the Pleiades are read in astrology as a single point of influence rather than as separate stars, with Alcyone standing in for the whole.
Where Alcyone sits in the zodiac
Here is the detail that trips up most students. Although the Pleiades belong to the constellation Taurus, in the tropical zodiac (the system most Western astrologers use) Alcyone does not fall at the start of the sign Taurus. Because of precession, the slow wobble of the Earth's axis, the constellations and the tropical signs have drifted apart over the centuries.
In the current era Alcyone lies near 0 degrees of tropical Gemini, which is the same as saying around 29 to 30 degrees of Taurus, right at the cusp where the Bull gives way to the Twins. Its position moves with precession, creeping forward very slowly over time. So if you want to know whether a planet or angle in your chart conjoins the Pleiades, look at the very end of Taurus and the very start of Gemini, not at early Taurus.
If you would like to find this degree against your own placements, you can cast a free birth chart and see what, if anything, sits near the Weeping Sisters.
The nature of the Pleiades: Moon and Mars
In classical star lore, Ptolemy assigned the Pleiades a nature of the Moon and Mars. That pairing is worth dwelling on, because it captures the cluster's character neatly. The Moon brings sensitivity, feeling, imagination, and a strong response to the visible world, while Mars adds drive, sharpness, and ambition. Together they describe something keen and reaching, yet emotionally exposed.
From this blend the tradition draws a set of recurring themes:
- A connection to vision and the eyes, both literally and in the sense of insight and farsightedness.
- Refinement, sensitivity, and an eye for beauty.
- Ambition and a desire to rise, carried with a tender or vulnerable edge.
- A susceptibility to sorrow, disappointment, or being deeply affected by events.
None of this is a verdict. Astrology is a symbolic and traditional language for reflection, not fortune-telling or scientific prediction, and a fixed star describes a tone or theme rather than a fixed outcome.
Why they are called the Weeping Sisters
The Pleiades have long carried a tender but sorrowful reputation. The mood is sometimes summarized in the old tradition with the blunt phrase "something to cry about," which captures the quality without overstating it. This is not meant as a prophecy of grief. It points instead to an emotional sensitivity, a tendency to feel things keenly and to be moved by beauty, loss, and longing.
In myth the sisters are often pictured weeping, and the cluster's soft, slightly veiled appearance in the sky has reinforced that image across many cultures. Read symbolically, the Pleiades describe a heart that is open and easily touched, ambition shadowed by wistfulness, and a refined sensibility that can ache as easily as it can soar. The sorrow and the beauty are two sides of the same sensitivity.
Working with the Pleiades in a chart
If a personal planet or an angle in your chart falls near the late degrees of Taurus or the very start of Gemini, the Pleiades may color that placement. As with all fixed stars, the contact matters most when it is tight, within a degree or so, and when it touches the Sun, Moon, Ascendant, or Midheaven rather than a distant minor point.
The constructive expression is the one to lean into: vision and insight, refined taste, creative or artistic sensitivity, and ambition guided by feeling. The shadow side is the same sensitivity turned inward, a vulnerability to sorrow or to being overwhelmed by what one perceives. Because the cluster carries both the Moon's tenderness and Mars's edge, the art is to let the sensitivity inform the drive without letting either one cut too deep.
Treat any of this as a symbolic invitation to reflect, not a fixed prediction. The fixed stars enrich a chart reading; they do not overrule the free and considered choices of the person living the chart.
Frequently Asked Questions
What are the Pleiades in astrology?
The Pleiades are an open star cluster in the constellation Taurus, known popularly as the Seven Sisters and catalogued as Messier 45. In astrology they are read as a single fixed-star influence, represented by their brightest star, Alcyone. Classically Ptolemy gave them a Moon and Mars nature, and the tradition associates them with vision, refinement, ambition, and a tender, sorrowful sensitivity.
Where is Alcyone in the zodiac?
Alcyone, the brightest star of the Pleiades, currently lies near 0 degrees of tropical Gemini, which is the same as roughly 29 to 30 degrees of Taurus, right at the cusp between the two signs. Although the Pleiades belong to the constellation Taurus, precession has shifted their tropical position forward, and Alcyone's degree continues to move very slowly over time.
What do the Pleiades mean in a birth chart?
In a birth chart the Pleiades are considered active when a planet or an angle sits closely, within about a degree, near the end of Taurus or the start of Gemini, especially when it touches the Sun, Moon, or the chart angles. The traditional themes are heightened sensitivity, vision and insight, refinement, and ambition carried with an emotional, sometimes sorrowful edge. This is a symbolic and interpretive language, not a prediction, so it describes a tone to reflect on rather than a fixed fate.
