The astrologer in Alexandria drew a circle. Inside it, he placed a dot for the Sun. A crescent for the Moon. The staff of Hermes for Mercury. The mirror of Venus. The spear of Mars. The lightning bolt of Jupiter. The scythe of Saturn. Each mark was a symbol, a gateway to the cosmos. Hellenistic astrology symbols are the glyphs used to represent planets, signs, houses, and aspects in the horoscopic tradition that flourished from the 1st century BCE to the 6th century CE.
A guide to the symbols that shaped Western astrology for two millennia, from the papyri of Alexandria to the charts we cast today.
The definition is simple. These symbols are not arbitrary drawings. They are condensed diagrams of meaning. The Sun’s circle with a dot is the source of light with a center. The Moon’s crescent traces its visible phase. The zodiac signs are animals or objects whose shapes evoke their nature. Aries is the ram’s horns. Taurus is the bull’s head. Gemini is the twins. And so on. The aspects – sextile, square, trine, opposition, conjunction – are geometric angles measured in the circle. Every line carries a calculation.
Where Did Hellenistic Astrology Symbols Come From?
The tradition we call Hellenistic astrology emerged in the Greek-speaking world of the eastern Mediterranean, primarily Egypt, between the 2nd century BCE and the 1st century CE. It drew on Babylonian omen astrology, Egyptian temple astronomy, and Greek philosophical concepts. The symbols we use today were not invented in a single moment. They evolved over centuries.
The earliest known horoscopes come from the 1st century BCE. Written on papyrus in Greek, they use abbreviations for the planets: ΗΛΙΟΣ for the Sun, ΣΕΛΗΝΗ for the Moon, but also shorter forms. The planetary glyphs we recognize – the circle with a dot for the Sun, the crescent for the Moon – appear in manuscripts from the 2nd century CE onward. The physician and astrologer Vettius Valens (120–175 CE) wrote his Anthology using these symbols. He is one of our most important sources because he copies charts directly, recording the symbols as they were drawn.
Claudius Ptolemy (c. 100–170 CE) published the Tetrabiblos, the most influential astrological text of the ancient world. Ptolemy did not invent the symbols, but he standardized the system of planetary dignities and debilities that the symbols represent. The Tetrabiblos is the backbone of the Hellenistic tradition. Dorotheus of Sidon (1st century CE) wrote a didactic poem, the Pentateuch, that describes the use of these symbols in chart interpretation. The Persian astrologer Abu Ma‘shar (787–886 CE) carried the symbols into the Islamic world, where they were preserved and refined.
The symbols themselves are a hybrid. The Greek alphabet provided the shapes (the letter kappa for a planetary abbreviation, theta for the Sun). Egyptian hieroglyphic and Demotic contributed the sign for the Moon (a crescent). Babylonian cuneiform gave the zodiac signs their animal forms. The result is a script that is neither purely Greek nor purely Egyptian. It is a third language, the language of the chart.
We use these symbols when we cast a chart. They are not decorative. They are the language of the heavens.
The Planets
The planetary symbols each condense a myth, a metal, a day of the week, and a physical quality.
- Sun (☉): A circle with a central dot. The dot is the source. The circle is the entire sky. The Sun is the giver of life, the king, the conscious self.
- Moon (☽): A crescent, sometimes open to the left. It mirrors the visible phase. The Moon is the body of change, the mother, the instinct.
- Mercury (☿): The caduceus of Hermes, the staff with two snakes and wings. The messenger. The planet of mind, communication, travel. The symbol is also the letter kappa (K) with a crossbar.
- Venus (♀): The mirror of the goddess. The circle with a cross below. Later tradition sees it as a hand mirror. Venus is love, beauty, value.
- Mars (♂): The spear and shield. The circle with an arrow pointing up and right. Mars is action, war, desire.
- Jupiter (♃): The lightning bolt of Zeus. The symbol is a cross (the Earth) with a curve (the heavens). Alternatively, the letter zeta (Z) for Zeus. Jupiter is expansion, kingship, mercy.
- Saturn (♄): The scythe of Kronos. The cross with a curve at the top. Saturn is limitation, time, structure.
The Hellenistic list ends at Saturn. Uranus, Neptune, and Pluto were not known. The symbols for the outer planets are modern inventions. We do not use them in the Hellenistic system.
The Zodiac Signs
The zodiac signs are glyphs derived from the constellation figures. The ram (Aries ♈) is the horns and the curved nose. The bull (Taurus ♉) is the head and the horns. The twins (Gemini ♊) are two vertical lines with a crossbar, representing the two brothers. The crab (Cancer ♋) is the claws. The lion (Leo ♌) is the mane and tail. The virgin (Virgo ♍) is the letter M with a loop, the maiden’s hair. The scales (Libra ♎) is the balance beam. The scorpion (Scorpio ♏) is the tail and stinger. The archer (Sagittarius ♐) is the arrow drawn back. The sea-goat (Capricorn ♑) is the fish tail and the goat’s head. The water-bearer (Aquarius ♒) is the waves of water. The fishes (Pisces ♓) are two fish tied together.
The Aspects
The aspects are angles measured along the ecliptic. The symbols are geometric.
- Conjunction (☌): A circle with a line below. Two bodies meet.
- Sextile (⚹): A six-pointed star with one ray missing. 60 degrees.
- Square (□): A square. 90 degrees. Tension.
- Trine (△): An equilateral triangle. 120 degrees. Harmony.
- Opposition (☍): A circle with a line through it. 180 degrees. Separation.
The Hellenistic tradition also used the minor aspects (semisextile, quincunx) but less frequently.
The Lots
The Lot of Fortune (⚀) has its own symbol: a circle with a cross inside, like a target. It represents the point where the Moon’s distance from the Sun is projected from the Ascendant. The symbol is a later addition but appears in manuscript charts.
The astrologer of the 2nd century drew the chart as a circle divided into twelve houses. He inscribed the planetary symbols in the appropriate signs and houses. He added the aspects by drawing lines between them. The result was a diagram that could be read at a glance.
The symbols were not just labels. They carried the dignities and debilities. A planet in its own sign (domicile) was strong. In its exaltation, stronger. In its fall, weak. In its detriment, opposite. The symbols were the shorthand for these relationships. The astrologer memorized the tables of the terms (Egyptian bounds) and the decans, but the chart itself was drawn with symbols.
We still use this method. When we cast a chart at Le Grand Grimoire, we draw the circle with the same symbols. The Sun symbol is still a circle with a dot. The Moon is still a crescent. The tradition is unbroken, though the medium has changed from papyrus to parchment to pixel.
The most visible difference is the Moon. In Hellenistic manuscripts, the crescent is open to the left (like a backward C). In modern typography, it is often open to the right. The difference is stylistic, not semantic. The symbol for Mercury is also variable. The Hellenistic version often has the crossbar of the caduceus below the circle, while modern prints place it above. Again, the same meaning.
The Earth symbol (♁) is absent from Hellenistic charts. The Earth is the center of the chart, not a planet. The modern symbol for Earth (a circle with a cross) was invented later, likely in the Renaissance.
The Hellenistic tradition does not use the outer planets or the modern asteroids. Its symbols are limited to the seven visible planets, the twelve signs, the five major aspects, and the Lots. This is a purer system, one that reflects the observable sky.
What People Get Wrong
A common misconception is that the symbols are arbitrary. They are not. Each one has a logical origin, even if the origin is lost in the transmission. The Sun symbol is a circle with a dot because the dot is the center of the cosmos. The Moon symbol is a crescent because that is what the Moon shows. The zodiac symbols are the constellation figures, stylized.
Another misconception is that the symbols are the same as the Greek mythological symbols. They are not. The Greek gods had their own attributes (the eagle for Zeus, the owl for Athena) but these were not used in astrology. The planetary symbols come from a different system.
A third misconception is that the symbols are only for decoration. In the Hellenistic world, the symbol was the link between the observer and the observed. Without it, the chart was a blank circle.
FAQ
What is the difference between Hellenistic and Modern astrology symbols?
The Hellenistic set includes only the seven visible planets and the five major aspects. The Moon crescent faces left, and the Earth symbol is not used. The modern set adds Uranus, Neptune, Pluto, and often the nodes.
Why are there two symbols for the Moon?
There is only one standard symbol (☽). Some manuscripts use a full circle with a dot for the full Moon, but the crescent is the primary form.
What is the symbol for the Lot of Fortune?
A circle with a cross inside (⚀). It is also called the Part of Fortune.
The symbols of Hellenistic astrology are not relics. They are a living script. We use them every time we cast a chart. To understand them is to read the language of the sky. For a deeper look at the structure these symbols represent, see our guide to the houses in Hellenistic astrology. For the full glyph set, visit the planetary symbols glossary. And for the tradition that gave them meaning, explore the astrology and zodiac hub.