Algol
BehenianBeta Persei · Perseus
Position (2026)
♉ 26°32' Taurus
Magnitude
2.09
Planetary Nature
Saturn / Jupiter (robson)
Robson assigns Saturn/Jupiter following Ptolemy. Some modern sources use Mars/Saturn. Traditionally considered the most malefic fixed star.
Spectral Type
B8V
Appearance
A blue-white eclipsing binary whose brightness dips every 2.87 days, marking the Medusa's severed head in the hand of Perseus
Behenian Correspondences
Gemstone
Diamond
Plant
Black hellebore
Read: The 15 Behenian Stars → background on Agrippa's list, the magical tradition, and how each star was historically used.
Name Origin
Language
Arabic
Original Form
Ra's al-Ghūl
Meaning
The Demon's Head, the Ghoul's Head
Beta Persei. From the Arabic Ra's al-Ghūl, the Head of the Demon or Ogre. Represents the severed head of Medusa held by Perseus. Its remarkable variability (dimming every 2.87 days) was likely known in antiquity and contributed to its sinister reputation. The Hebrew name Rōsh ha Sāṭān (Satan's Head) and the Latin Caput Larvæ (Head of the Spectre) reflect the same fearsome associations across cultures.
Known As
Algol in Astrology
Algol, the Demon Star and head of Medusa in Perseus, is the most feared fixed star in traditional astrology. It carries the raw, primal power of the feminine shadow, the rage of the violated and the force of transformation through confrontation with what terrifies. Its Saturn-Jupiter nature concentrates and expands this energy simultaneously. You are an agent of upheaval who forces others to look at what they have denied. Properly channeled, Algol grants extraordinary power to heal, transform, and break through collective taboos.
When Algol Is Angular
Algol carries additional weight when it falls on one of the chart angles, independent of any planet conjunction.
If Culminating
Algol culminating at the Midheaven brings the native into contact with extreme circumstances in their public life, where themes of crisis, transformation, and confrontation with primal forces become central to their reputation. There is an intensity to the career path that cannot be softened or avoided. When well supported by benefic planets, this position can indicate triumph over formidable opposition, but it always carries an undertone of danger and the potential for dramatic reversals.
Mythology & History
Algol embodies the severed head of Medusa, the Gorgon whose gaze turned all who beheld her to stone. Once a maiden of extraordinary beauty, she was transformed by Minerva into a creature of serpentine horror after desecrating the goddess's temple. Perseus slew her with the aid of Athena's mirrored shield, and the winking of this variable star has been read since antiquity as the baleful eye of the Gorgon opening and closing in eternal fury.
Algol, the Demon Star, takes its name from the Arabic Ra's al-Ghul, meaning 'head of the demon' or 'head of the ghoul.' In Greek mythology it represents the severed head of Medusa, the Gorgon whose gaze turned men to stone, carried by the hero Perseus after he beheaded her. Algol's remarkable variability, dimming noticeably every 2.87 days as its companion star eclipses it, was known to ancient observers who interpreted the winking as the baleful eye of the Gorgon opening and closing. The Hebrews called it Rosh ha-Satan, the Head of Satan, and Chinese astronomers named it Tsi Chi, a designation associated with corpses.
Algol has been feared across cultures for millennia, and its inclusion among the fifteen Behenian stars reflects its acknowledged power rather than any benevolence. Cornelius Agrippa associated it with diamond and black hellebore, prescribing talismans for protection and the overcoming of enemies. Medieval Arabic astrologers called it the most unfortunate star in the heavens, yet paradoxically it was one of the most frequently invoked in stellar magic precisely because its power was undeniable. Modern astrological practice has rehabilitated Algol somewhat, recognizing it as a star of raw transformative power that destroys what is false and forces confrontation with shadow material.
Perseus Context
Algol sits in the constellation Perseus, marking the head of the Gorgon Medusa that the hero carries in his left hand. Perseus is one of the great hero constellations, depicting the young man who rescued Andromeda from the sea monster after slaying Medusa with the aid of divine gifts: winged sandals from Hermes, a cap of invisibility from Hades, and a reflective shield from Athena. The constellation embodies themes of courage in the face of mortal danger, divine assistance, and the power gained through confronting the monstrous. Algol, as the Gorgon's head, represents the trophy that proves the hero's triumph over primal terror.
Learn more about Perseus and its stars.
Natal Conjunctions
Find your conjunctions →Algol Conjunct Sun
Algol conjunct the Sun produces a personality that embodies transformative intensity. You carry primal power that others find both fascinating and disturbing. Life involves confrontation with taboo, shadow, and the darker dimensions of human experience, and you gain strength from what would destroy others.
Algol Conjunct Moon
Algol conjunct the Moon creates an emotional nature of extreme depth and volatility. The inner life pulses with raw, archetypal forces, and you possess uncanny psychological insight born from intimate acquaintance with the shadow. Emotional transformation is a recurring theme, and you often serve as a catalyst for others' healing.
Algol Conjunct Mercury
Algol conjunct Mercury bestows a mind that pierces through denial and social pretense. You speak uncomfortable truths and possess an intellect that gravitates toward forbidden knowledge, taboo subjects, and the hidden mechanisms of power. Communication has a disarming, sometimes shocking directness.
Algol Conjunct Venus
Algol conjunct Venus intensifies desire and attraction with a primal, dangerous edge. Relationships serve as vehicles for deep transformation, and you are drawn to love that carries elements of risk, power exchange, or confrontation with the forbidden. Beauty has a dark, compelling quality.
Algol Conjunct Mars
Algol conjunct Mars unleashes raw, primal aggression in service of transformation. You possess extraordinary physical and psychological courage, with a willingness to enter spaces that others flee from. Combat instincts are heightened, and you excel in crisis situations requiring fierce, immediate action.
Algol Conjunct Jupiter
Algol conjunct Jupiter draws you toward belief systems that refuse to look away from human darkness. You find meaning in the taboo -- your philosophy, faith, or spiritual practice must account for suffering, rage, and the monstrous, or it holds no truth for you. Religion and ideology become vehicles for shadow work, and you may become a teacher or preacher who insists that wisdom requires descent into what others call profane.
Algol Conjunct Saturn
Algol conjunct Saturn concentrates primal power into structured, controlled forms. You learn to manage extreme forces through discipline and patience, building authority from experiences that test the limits of endurance. Power is wielded with deliberation, and you become formidable through sustained confrontation with limitation.
Algol Conjunct Uranus
Algol conjunct Uranus shatters the structures of denial that keep collective darkness invisible. You carry the energy of Medusa's severed head held aloft -- the sudden, shocking revelation that forces witnesses to confront what they have spent lifetimes refusing to see. Feminine rage, long suppressed and turned to stone, erupts through you as revolutionary upheaval that tears away polite fictions and exposes raw truth beneath.
Algol Conjunct Neptune
Algol conjunct Neptune dissolves the boundary between the primal and the mystical. You access extraordinary psychic depths and may channel visionary experiences that originate in the collective shadow. Discernment is essential; the line between illumination and delusion is thin at this intensity.
Algol Conjunct Pluto
Algol conjunct Pluto fuses the Gorgon's primal fury with Pluto's demand for total psychological annihilation and rebirth. You undergo destruction at the deepest level -- identity, belief, attachment -- and reconstitute yourself from the raw material that remains. Each death strips away another layer of false self, and you emerge with an increasing capacity to facilitate the same shattering transformation in others. This is the signature of the healer-destroyer who has genuinely died to who they were.
Algol Conjunct North Node
Algol conjunct the North Node marks a karmic arc from complicity and comfortable denial toward unflinching confrontation with shadow. You are growing away from the safety of looking away, of keeping peace by tolerating what should not be tolerated. The soul's direction demands you become someone who names the unnamed, who holds the Gorgon's gaze rather than averting your eyes, and who transmutes the collective's suppressed rage into conscious, healing power.
Algol Conjunct Ascendant
Algol on the Ascendant gives a presence that is simultaneously magnetic and unsettling. Others sense the primal power you carry, and reactions range from fascination to fear. The life path involves visible engagement with transformation, healing, or the breaking of taboos.
Algol Conjunct Midheaven
Algol on the Midheaven marks a career that engages directly with shadow material, psychology, surgery, crisis intervention, transformative art, or social upheaval. Professional success requires willingness to go where others refuse, and recognition comes through the courage to confront what society would prefer to ignore.
Algol Conjunct Part of Fortuna
The Part of Fortuna conjunct Algol turns the Gorgon's petrifying gaze upon material prosperity itself. Wealth that seems within reach turns to stone before your hands can close around it, and the conventional paths to financial security prove unreliable or actively hostile. There is a pattern of resources being stripped away through circumstances beyond your control, forcing repeated rebuilding from the ground up. The deeper teaching is that Algol's transformative power operates through the destruction of attachment to material comfort, compelling you to discover what remains valuable when everything that can be taken has been. True fortune, under this placement, is the psychological resilience forged through involuntary loss.
Paran Interpretations
Parans describe what happens when Algol and a planet simultaneously occupy the four angles (rising, culminating, setting, nadir) at a given location.
Algol in Paran with Sun
Rising
Algol rising with the Sun marks a life initiated through early confrontation with primal forces and shadow material.
Culminating
Algol culminating with the Sun places transformative power at the peak of public visibility and career achievement.
Setting
Algol setting with the Sun indicates wisdom gained through a lifetime of confronting darkness, with healing power deepening with age.
At the Nadir
Algol at the nadir with the Sun conceals immense primal power at the deepest foundations of the psyche.
Algol in Paran with Moon
Rising
Algol rising with the Moon awakens intense emotional and psychic sensitivity from the earliest years.
Culminating
Algol culminating with the Moon brings emotional depth and transformative power to public prominence.
Setting
Algol setting with the Moon indicates emotional mastery gained through decades of inner shadow work.
At the Nadir
Algol at the nadir with the Moon harbors profound, archaic emotional forces that operate at subconscious levels.
Algol in Paran with Mercury
Rising
Algol rising with Mercury bestows a mind that instinctively penetrates beyond surface appearances from childhood.
Culminating
Algol culminating with Mercury elevates the capacity for truth-telling and taboo-breaking to career-defining prominence.
Setting
Algol setting with Mercury deepens intellectual penetration over time, with the most powerful insights arriving in maturity.
At the Nadir
Algol at the nadir with Mercury conceals a mind of extraordinary depth that processes shadow material beneath conscious awareness.
Algol in Paran with Venus
Rising
Algol rising with Venus initiates early experiences of love that carry transformative, sometimes dangerous intensity.
Culminating
Algol culminating with Venus achieves recognition through art or relationships that confront the forbidden dimensions of beauty.
Setting
Algol setting with Venus brings enduring relationships forged through shared encounters with the shadow.
At the Nadir
Algol at the nadir with Venus conceals depths of desire and aesthetic power that few ever perceive directly.
Algol in Paran with Mars
Rising
Algol rising with Mars produces an individual equipped with primal courage and ferocious protective instincts from birth.
Culminating
Algol culminating with Mars places raw warrior power at the apex of career achievement.
Setting
Algol setting with Mars transmutes primal aggression into strategic, concentrated force over the course of a lifetime.
At the Nadir
Algol at the nadir with Mars conceals volcanic reserves of fighting power that erupt only under extreme provocation.
Algol in Paran with Jupiter
Rising
Algol rising with Jupiter expands transformative potential into broad philosophical or spiritual territory from early life.
Culminating
Algol culminating with Jupiter achieves widest influence through teachings that address the totality of human experience.
Setting
Algol setting with Jupiter brings expanding philosophical depth about transformation and shadow in the mature years.
At the Nadir
Algol at the nadir with Jupiter builds on hidden foundations of vast understanding about the nature of power and change.
Algol in Paran with Saturn
Rising
Algol rising with Saturn demands early confrontation with limitation and fear, forging extraordinary resilience.
Culminating
Algol culminating with Saturn achieves lasting authority through disciplined mastery of primal forces.
Setting
Algol setting with Saturn builds a legacy of structured power over shadow material that endures across generations.
At the Nadir
Algol at the nadir with Saturn establishes the deepest possible foundations of controlled, disciplined engagement with the shadow.
Algol in Paran with Ascendant
Rising
Algol rising with the Ascendant stamps the personality with unmistakable intensity and transformative magnetism.
Culminating
Algol culminating with the Ascendant projects primal power onto the broadest stage of personal expression.
Setting
Algol setting with the Ascendant draws others who are transformed by encountering your depth.
At the Nadir
Algol at the nadir with the Ascendant grounds identity in reserves of power that operate far beneath conscious awareness.
Algol in Paran with Midheaven
Rising
Algol rising with the Midheaven launches a career defined by engagement with shadow, transformation, or taboo-breaking.
Culminating
Algol culminating with the Midheaven represents the summit of professional achievement through confronting what others avoid.
Setting
Algol setting with the Midheaven indicates a professional legacy of transformative impact that grows in significance over time.
At the Nadir
Algol at the nadir with the Midheaven builds career power on hidden foundations of intimate knowledge of shadow and depth.
Star Connections
The Gorgon and the King's Fortune
When Algol conjoins Mars or Saturn while the Moon stands with Sadalmelik, traditional sources describe a grim fate involving capital punishment by royal or judicial command. Algol's raw, transformative violence becomes channeled through the formal structures of authority that Sadalmelik represents.
The Gorgon's Judicial Shadow
When Algol activates with Mars or Saturn while the Moon aligns with Denebola, the ancient texts warn of death by judicial sentence. Algol's primal, transgressive force meets Denebola's connection to legal and civic consequences, creating a pattern where breaking boundaries leads to formal punishment.
The Serpent's Venom
When Algol is angular or conjoins a malefic while the Moon stands with Alphard, the traditional texts specifically warn of death by water or poison. The Gorgon's transformative fury combines with the Hydra's venomous nature to create one of the most feared compound conditions in classical star lore.
Notable Charts
Frida Kahlo
Midheaven conjunct Algol
Art that confronted suffering, the body, and the shadow with unflinching intensity
Stephen King
Sun conjunct Algol
Career built on confronting collective fears and giving form to the monstrous
Sigmund Freud
Mercury conjunct Algol
Pioneering exploration of the unconscious, taboo desires, and the shadow dimensions of the psyche
Frequently Asked Questions
Is Algol the most dangerous fixed star?
Algol has the most feared reputation among fixed stars, but its effects are more nuanced than simple danger. It represents the power of raw, primal energy that can be destructive when unconscious or deeply transformative when consciously channeled. Many accomplished surgeons, therapists, and crisis workers have prominent Algol contacts in their charts.
What does Algol conjunct the Sun mean in a birth chart?
Algol conjunct the Sun intensifies your engagement with themes of power, transformation, and confronting what others fear. The personality carries an edge of danger or fascination. When channeled constructively, this placement produces individuals who can face extreme situations with unusual composure.
What does the name Algol mean?
The name Algol comes from Arabic: Ra's al-Ghūl, meaning "The Demon's Head, the Ghoul's Head." Beta Persei. The star is known by 4 different cultural names across world traditions.
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