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A planet symbol or planetary symbol is a graphical symbol used in astrology and astronomy to represent a classical planet (including the Sun and the Moon) or one of the modern planets. The symbols were also used in alchemy to represent the metals associated with the planets, and in calendars for their associated days. The use of these symbols derives from Classical Greco-Roman astronomy, though their current shapes are a development of the 16th century.

The classical planets, their symbols, days and most commonly associated planetary metals are:

planet	Moon	Mercury	Venus	Sun	Mars	Jupiter	Saturn
symbol
day	Monday	Wednesday	Friday	Sunday	Tuesday	Thursday	Saturday
metal	silver	mercury	copper	gold	iron	tin	lead

The International Astronomical Union (IAU) discourages the use of these symbols in modern journal articles, and their style manual proposes one- and two-letter abbreviations for the names of the planets for cases where planetary symbols might be used, such as in the headings of tables. The modern planets with their traditional symbols and IAU abbreviations are:

planet	Mercury	Venus	Earth	Mars	Jupiter	Saturn	Uranus	Neptune
symbol
initial (IAU)	Me	V	E	Ma	J	S	U	N

The symbols of Venus and Mars are also used to represent female and male in biology following a convention introduced by Carl Linnaeus in the 1750s.

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 History

 Classical planets

Antecedents of the planetary symbols are attested in the attributes given to classical deities. The Roman planisphere of Bianchini (2nd century, currently in the Louvre, inv. Ma 540) shows the seven planets represented by portraits of the seven corresponding gods, each a bust with a halo and an iconic object or dress, as follows: Mercury has a caduceus and a winged cap; Venus has a necklace and a shining mirror; Mars has a war-helmet and a spear; Jupiter has a laurel crown and a staff; Saturn has a conical headdress and a scythe; the Sun has rays emanating from his head; and the Moon has a crescent atop her head.

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  Luna with a crescent

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  Mercury with a caduceus

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  Venus with a shining mirror

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  Sol emanating rays

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  Mars with a spear

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  Jupiter with a staff

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  Saturn with a scythe

The written symbols for Mercury, Venus, Jupiter, and Saturn have been traced to forms found in late Greek papyri. Early forms are also found in medieval Byzantine codices which preserve horoscopes.

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  The symbol for the Moon in a medieval Byzantine (11th c.) ms. The appearance in late Classical times was similar.

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  The symbol for Mercury in late Classical (4th c.) and medieval Byzantine (11th c.) mss

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  The symbol for Venus in late Classical (4th c.) and medieval Byzantine (11th c.) mss

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  The disk with a ray as a symbol for the Sun in late Classical (4th c.) and medieval Byzantine (11th c.) mss

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  The symbol for Mars in late Classical (6th c.) and medieval Byzantine (11th c.) mss.

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  The symbol for Jupiter in late Classical (4th c.) and medieval Byzantine (11th c.) mss

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  The symbol for Saturn in late Classical (4th & 5th c.) and medieval Byzantine (11th c.) mss. Cf. kappa-rho, ⟨κρ⟩.

A diagram in the astronomical compendium by Johannes Kamateros (12th century) closely resembles the 11th-century forms shown above, with the Sun represented by a circle with a single ray, Jupiter by the letter zeta (the initial of Zeus, Jupiter's counterpart in Greek mythology), Mars by a shield crossed by a spear, and the remaining classical planets by symbols resembling the modern ones, though without the cross-marks seen in modern versions of Mercury, Venus, Jupiter and Saturn. These cross-marks first appear in the late 15th or early 16th century. According to Maunder, the addition of crosses appears to be "an attempt to give a savour of Christianity to the symbols of the old pagan gods." The modern forms of the classical planetary symbols are found in a woodcut of the seven planets in a Latin translation of Abu Ma'shar al-Balkhi's De Magnis Coniunctionibus printed at Venice in 1506, represented as the corresponding gods riding chariots.

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  Early modern depiction of the planet symbols in an alchemical context (Musaeum Hermeticum, 1678)

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  Page spread (with the signs for Mars and Venus) from a 1515 illustrated edition of Abu Ma'shar al-Balkhi's De Magnis Coniunctionibus (in the by translation by Herman of Carinthia, 1140ح. 1140, editio princeps by Erhard Ratdolt of Augsburg, 1489).

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  Depiction of the planets in a 15th-century Arabic manuscript of Abu Ma'shar's "Book of nativities"

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  Medieval planisphere showing the zodiac and the classical planets. The planets are represented by seven faces.

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  16th-century mechanical clock calendar, using the symbols of the eponymous planets for the days of the week.

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  Planetary-metal symbols at the center of the coat of arms of the Royal Society of Chemistry

 Earth symbol

المقالة الرئيسية: Earth symbol

Four-quarters-of-the-world symbol for Earth

Globus cruciger symbol for Earth

Earth is not one of the classical planets, as "planets" by definition were "wandering stars" as seen from Earth's surface. Earth's status as planet is a consequence of heliocentrism in the 16th century. Nonetheless, there is a pre-heliocentric symbol for the world, now used as a planetary symbol for the Earth. This is a circle crossed by a horizontal and vertical line, representing the world divided by four rivers into the four quarters of the world (often translated as the four "corners" of the world): . A variant, now obsolete, had only the horizontal line: .

A medieval European symbol for the world – the globus cruciger, (the globe surmounted by a Christian cross) – is also used as a planetary symbol; it resembles an inverted symbol for Venus.

The planetary symbols for Earth are encoded in Unicode at U+1F728 🜨 alchemical symbol for verdigris and U+2641 ♁ earth.

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  The Olympian gods, atop a -shaped world

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  Stylized Earth symbol

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  A simple globus cruciger

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  Three globi crucigeri in the coat of arms of Maschwanden in Switzerland

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  In the flag of Uppsala, the globe of the globus cruciger is stylized as a T-and-O map,

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  In this globus cruciger, the cross is surmounted on a celestial orb with stars

 Classical planets

للمزيد من المعلومات: Classical planets and Days of the week

 Moon

للمزيد من المعلومات: Crescent and Astronomical symbols § Symbols for the Sun and Moon

Decrescent symbol for the Moon

Encrescent symbol for the Moon

The crescent shape has been used to represent the Moon since earliest times. In classical antiquity, it is worn by lunar deities (Selene/Luna, Artemis/Diana, Men, etc.) either on the head or behind the shoulders, with its horns pointing upward. The representation of the moon as a simple crescent with the horns pointing to the side (as a heraldic crescent increscent or crescent decrescent) is attested from late Classical times.

The same symbol can be used in a different context not for the Moon itself but for a lunar phase, as part of a sequence of four symbols for "new moon" (U+1F311 🌑︎), "waxing" (U+263D ☽︎), "full moon" (U+1F315 🌕︎) and "waning" (U+263E ☾︎).

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  The Moon symbol, representing silver mining, in the municipal coat of arms of Sala in Sweden

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  The Moon symbol in the municipal coat of arms of Silvbergs ('Silver Mountain') in Sweden

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  Stylized Moon symbol

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  The Moon for silver

 Mercury

Crossed caduceus symbol for Mercury

The symbol قالب:Char for Mercury is a caduceus (a staff intertwined with two serpents), a symbol associated with Mercury/Hermes throughout antiquity. Some time after the 11th century, a cross was added to the bottom of the staff to make it seem more Christian.

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  The god Hermes (Mercury) with his caduceus

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  The caduceus, copied from pottery

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  The caduceus in a tapestry, 3rd century

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  Mercury symbol, representing quicksilver mining, in the municipal coat of arms of Stahlberg, Rhineland-Palatinate, Germany.

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  Stylized Mercury symbol

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  Mercury for quicksilver

The قالب:Char symbol has also been used to indicate intersex, transgender, or non-binary gender. A related usage is for the 'worker' or 'neuter' sex among social insects that is neither male nor (due to its lack of reproductive capacity) fully female, such as for example worker bees. It was also once the designated symbol for hermaphroditic or 'perfect' flowers, but botanists now use قالب:Char for these instead.

Its Unicode codepoint is U+263F ☿ mercury (HTML ☿).

 Venus

Crossed copper symbol for Venus

The Venus symbol, ♀, consists of a circle with a small cross below it. It has been interpreted as a depiction of the hand-mirror of the goddess, which may also explain Venus's association with the planetary metal copper, as mirrors in antiquity were made of polished copper (alloy), though this is not certain. In the Greek Oxyrhynchus Papyri 235, the symbols for Venus and Mercury didn't have the cross on the bottom stroke, and Venus still appears without the cross (⚲) in Johannes Kamateros (12th century).

In botany and biology, the symbol for Venus is used to represent the female sex, alongside the symbol for Mars representing the male sex, following a convention introduced by Linnaeus in the 1750s. Arising from the biological convention, the symbol also came to be used in sociological contexts to represent women or femininity. This gendered association of Venus and Mars has been used to pair them heteronormatively, describing women and men stereotypically as being so different that they can be understood as coming from different planets, an understanding popularized in 1992 by the book titled Men Are from Mars, Women Are from Venus.

Unicode encodes the symbol as U+2640 ♀ female sign (HTML ♀), in the Miscellaneous Symbols block.

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  A bronze mirror, of the type associated with Venus

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  Cupid holding up a similar mirror to Venus

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  The Venus symbol, representing copper mining, in the municipal coat of arms of Falun Municipality in Sweden (1932).

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  Raised fist within Venus symbol, used as a symbol of second-wave feminism (1960s)

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  Stylized Venus symbol

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  Venus for copper

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 Sun

للمزيد من المعلومات: Solar symbol and Symbols for the Sun and Moon

Modern astronomical symbol for the Sun

Medieval astronomical symbol for the Sun

The modern astronomical symbol for the Sun, the circumpunct (U+2609 ☉ sun (HTML ☉)), was first used in the Renaissance. It possibly represents Apollo's golden shield with a boss; it is unknown if it traces descent from the nearly identical Egyptian hieroglyph for the Sun.

Bianchini's planisphere, produced in the 2nd century, shows a circlet with rays radiating from it. In late Classical times, the Sun is attested as a circle with a single ray. A diagram in Johannes Kamateros' 12th century Compendium of Astrology shows the same symbol. This older symbol is encoded by Unicode as U+1F71A 🜚 alchemical symbol for gold (HTML 🜚) in the Alchemical Symbols block. Both symbols have been used alchemically for gold, as have more elaborate symbols showing a disk with multiple rays or even a face.

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  A buckler with a sun symbol and dot at center

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  Stylized circumpunct symbol for the Sun

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  The Sun for gold

 Mars

Spear and shield symbol for Mars

The Mars symbol, ♂, is a depiction of a circle with an arrow emerging from it, pointing at an angle to the upper right in Europe and to the upper left in India. As astrological symbol it represents the planet Mars. It is also the old and obsolete symbol for iron in alchemy. In zoology and botany, it is used to represent the male sex (alongside the astrological symbol for Venus representing the female sex), following a convention introduced by Linnaeus in the 1750s.

The symbol dates from at latest the 11th century, at which time it was an arrow across or through a circle, thought to represent the shield and spear of the god Mars; in the medieval form, for example in the 12th-century Compendium of Astrology by Johannes Kamateros, the spear is drawn across the shield. The Greek Oxyrhynchus Papyri show a different symbol, perhaps simply a spear.

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  3rd-century coin with Mars on the reverse, with lance and shield. The same symbols were used for Athena (Pallas).

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  Mars with spear and shield, Pomeii.

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  The Mars symbol, representing iron mining, in the municipal coat of arms of Karlskoga in Sweden

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  The Mars symbol in the municipal coat of arms of Loppi in Finland

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  Mars symbol in the patch for NASA's Viking mission

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  Stylized Mars symbol. The spear partly crosses the shield.

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  Mars for iron

Its Unicode codepoint is U+2642 ♂ male sign (HTML ♂).

 Jupiter

Zeus initial for Jupiter

The symbol for Jupiter, ♃, is originally a Greek zeta, Ζ, with a stroke indicating that it is an abbreviation (for Zeus, the Greek equivalent of Roman Jupiter).

Its Unicode codepoint is U+2643 ♃ jupiter (HTML ♃).

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  Jupiter and Saturn symbols in patch for NASA's Mariner Jupiter-Saturn mission

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  Stylized Jupiter symbol

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  Jupiter for tin

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  A modern form of the symbol that reflects its origin in the letter 'Z'

 Saturn

Crossed kappa-rho ligature for Saturn

Salmasius and earlier attestations show that the symbol for Saturn, ♄, derives from the initial letters (Kappa, rho) of its ancient Greek name Κρόνος (Kronos), with a stroke to indicate an abbreviation. By the time of Kamateros (12th century), the symbol had been reduced to a shape similar to a lower-case letter eta η, with the abbreviation stroke surviving (if at all) in the curl on the bottom-right end. The horizontal stroke was added along with the "Christianization" of other symbols in the early 16th century.

Its Unicode codepoint is U+2644 ♄ saturn (HTML ♄).

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  Emblem of the Fraternitas Saturni, a German magical order founded in 1926

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  The Saturn symbol representing lead in the municipal coat of arms of Bleiwäsche, since 1975 part of Bad Wünnenberg, North Rhine-Westphalia, Germany

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  Stylized Saturn symbol

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  Saturn for lead (Pb)

 Modern discoveries

 Uranus

Platinum symbol for Uranus

Herschel monogram for Uranus

The symbols for Uranus were created shortly after its discovery in 1781. One symbol, ⛢, invented by J. G. Köhler and refined by Bode, was intended to represent the newly discovered metal platinum; since platinum, commonly called white gold, was found by chemists mixed with iron, the symbol for platinum combines the alchemical symbols for iron, ♂, and gold, ☉. Gold and iron are the planetary metals for the Sun and Mars, and so share their symbols. Several orientations were suggested, but an upright arrow is now universal.

Another symbol, ♅, was suggested by Lalande in 1784. In a letter to Herschel, Lalande described it as "un globe surmonté par la première lettre de votre nom" ("a globe surmounted by the first letter of your name"). The platinum symbol tends to be used by astronomers and the monogram by astrologers.

For use in computer systems, the symbols are encoded U+26E2 ⛢ astronomical symbol for uranus and U+2645 ♅ uranus.

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  The planetary symbols as rendered in 1784, including the newly discovered Uranus (left)

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  The Uranus platinum symbol on William Herschel's heraldry (center, blue background)

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  Stylized Uranus monogram

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 Neptune

Trident symbol for Neptune

Obsolete Le Verrier monogram for Neptune

Several symbols were proposed for Neptune to accompany the suggested names for the planet. Claiming the right to name his discovery, Urbain Le Verrier originally proposed to name the planet for the Roman God Neptune and the symbol of a trident, while falsely stating that this had been officially approved by the French Bureau des Longitudes. In October, he sought to name the planet Leverrier, after himself, and he had loyal support in this from the observatory director, François Arago, who in turn proposed a new symbol for the planet, ⯉ (). However, this suggestion met with resistance outside France, and French almanacs quickly reintroduced the name Herschel for Uranus, after that planet's discoverer Sir William Herschel, and Leverrier for the new planet, though it was used by anglophone institutions. Professor James Pillans of the University of Edinburgh defended the name Janus for the new planet, and proposed a key for its symbol. Meanwhile, Struve presented the name Neptune on December 29, 1846, to the Saint Petersburg Academy of Sciences. In August 1847, the Bureau des Longitudes announced its decision to follow prevailing astronomical practice and adopt the choice of Neptune, with Arago refraining from participating in this decision. The planetary symbol was Neptune's trident, with the handle stylized either as a cross , following Mercury, Venus and the asteroids, or as an orb , following the symbols for Uranus and Earth. The cross variant is the more common today.

For use in computer systems, the symbols are encoded as U+2646 ♆ neptune and U+2BC9 ⯉ neptune form two.

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  Athena (Pallas) with her lance and Poseidon (Neptune) with his trident. These weapons became the symbols of the planets Pallas and Neptune, respectively.

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  Poseidon with a trident, 6th century BCE

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  Poseidon with a trident, 6th century CE

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  Stylized Neptune symbol (orb base)

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  Stylized Neptune symbol (cross base)

 Pluto

Bident symbol for Pluto

Percival Lowell monogram for Pluto

Pluto was almost universally considered a planet from its discovery in 1930 until its re-classification as a dwarf planet (planetoid) by the IAU in 2006. Planetary geologists and astrologers continue to treat it as a planet. The original planetary symbol for Pluto was a monogram of the letters P and L. Astrologers generally use a bident with an orb. NASA has used the bident symbol since Pluto's reclassification. These symbols are encoded as U+2647 ♇ pluto and U+2BD3 ⯓ pluto form two.

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  Pluto holding a bident

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  Pluto with a bident

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  Pluto symbol stylized as an inverted Mercury

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  Pluto compared in size to Earth's moon in a NASA publication

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  ⯖, an astrological symbol used for Pluto in Germany and Denmark, representing Pluto's orbit crossing Neptune's

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  ⯔, an astrological symbol used in the Mediterranean and Germany. The globe at bottom may be larger or omitted altogether.

 Minor planets

"Designation of celestial bodies" in a German almanac printed 1850

In the 19th century, planetary symbols for the major asteroids were also in use, including 1 Ceres (a reaper's sickle, encoded U+26B3 ⚳ ceres), 2 Pallas (a lance, U+26B4 ⚴ pallas) and 3 Juno (a sceptre, encoded U+26B5 ⚵ juno). Encke (1850) used symbols for 5 Astraea, 6 Hebe, 7 Iris, 8 Flora and 9 Metis in the Berliner Astronomisches Jahrbuch.

In the late 20th century, astrologers abbreviated the symbol for 4 Vesta (the sacred fire of Vesta, encoded U+26B6 ⚶ vesta), and introduced new symbols for 5 Astraea (, a stylised % sign, shift-5 on the keyboard for asteroid 5), 10 Hygiea (a caduceus – a common error in the US for a staff of Asclepius, itself an error for the snake symbol of Hygiea – encoded U+2BDA ⯚ hygiea) and for 2060 Chiron, discovered in 1977 (a key, U+26B7 ⚷ chiron). Chiron's symbol was adapted as additional centaurs were discovered; symbols for 5145 Pholus and 7066 Nessus have been encoded in Unicode. The abbreviation of the Vesta symbol is now universal, and the astrological symbol for Pluto has been used astronomically for Pluto as a dwarf planet.

In the early 21st century, symbols for the trans-Neptunian dwarf planets have come into use, particularly Eris (the hand of Eris, ⯰, but also ⯱), Sedna, Haumea, Makemake, Gonggong, Quaoar and Orcus which are in Unicode. All (except Eris, for which the hand of Eris is a traditional Discordian symbol) were devised by Denis Moskowitz, a software engineer in Massachusetts.

Unicode characters for minor planets

			Code point
Ceres			(⚳) CERES at U+26B3.
Pallas			(⚴) PALLAS at U+26B4.
Juno			(⚵) JUNO at U+26B5.
Vesta			(⚶) VESTA at U+26B6.
Hygiea			(⯚) HYGIEA at U+2BDA.
Chiron			(⚷) CHIRON at U+26B7.
Pholus			(⯛) PHOLUS at U+2BDB
Nessus			(⯜) NESSUS at U+2BDC
Orcus			(🝿) ORCUS at U+1F77F
Haumea			(🝻) HAUMEA at U+1F77B
Quaoar			(🝾) QUAOAR at U+1F77E
Makemake			(🝼) MAKEMAKE at U+1F77C
Gonggong			(🝽) GONGGONG at U+1F77D
Eris			(⯰) ERIS FORM ONE at U+2BF0
			(⯱) ERIS FORM TWO at U+2BF1, used by astrologer Henry Seltzer
Sedna			(⯲) SEDNA at U+2BF2

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  Ceres with her sickle

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  Athena (Pallas) with her lance (left)

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  Juno with her scepter

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  Vesta's sacred fire

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  Hygiea with her snake (old astr. symbol )

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  Petroglyph of Makemake

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  Orcus's gape

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  A human-headed serpent similar to depictions of Gonggong

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  The Hand of Eris from the Principia Discordia

 Additional symbols

From 1845 to 1855, many symbols were created for newly discovered asteroids. But by 1851, the spate of discoveries had led to a general abandonment of these symbols in favour of numbering all asteroids instead.

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  Astraea with her scales (astronomical symbol or )

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  Hebe bearing a cup (astr. symbol )

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  Iris as the rainbow (astr. symbol )

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  Flora dispensing flowers (astr. symbol )

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  Metis (astr. symbol )

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  Hygiea with her snake (astr. symbol )

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  Parthenope (astr. symbol )

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  Parthenope with her lyre (astr. symbol )

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  Victory (Victoria) with a laurel wreath (astr. symbol or )

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  Egeria (astr. symbol ) dictating the laws of Rome to Numa Pompilius

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  Peace (Irene) as a freed dove (astr. symbol )

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  Peace with wings and an olive branch

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  Eunomia (astr. symbol ) at left, as allegory of law and good order; Irene in centre

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  Psyche with butterfly wings (astr. symbol )

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  Psyche accompanied by a butterfly, and Hermes with a multiply twisted caduceus

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  Psyche with butterfly wings, and Charon standing in his lunate boat

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  Thetis with a dolphin (astro. symbol )

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  Melpomene with a dagger (astr. symbol )

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  Fortuna with her wheel (astro. symbol )

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  blindfolded Fortuna balanced on a wheel

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  Proserpina with a pomegranate (astr. symbol )

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  Bellona with a lance and flail (astro. symbol )

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  Amphitrite on a shell (astr. symbol )

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  Leukothea (astr. symbol ) as goddess of sailors

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  Faith (Fides, astr. symbol ) triumphs over idolatry

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