Planet symbols

A planet symbol or planetary symbol is a graphical symbol used in

; their modern forms developed in the 16th century.

The classical planets, their symbols, days and most commonly associated

are:

planet	Moon	Mercury	Venus	Sun	Mars	Jupiter	Saturn
symbol
unicode	☾	☿	♀︎	☉	♂︎	♃	♄
day	Monday	Wednesday	Friday	Sunday	Tuesday	Thursday	Saturday
metal	silver	quicksilver	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.^[1] The modern planets with their traditional symbols and IAU abbreviations are:

planet	Mercury	Venus	Earth	Mars	Jupiter	Saturn	Uranus	Neptune
symbol
initial (IAU)	Me H[a]	V	E	Ma M[a]	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.

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)^[2] 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.

• 
  Luna with a crescent
• 
  Mercury with a caduceus
• 
  Venus with a shining mirror
• 
  Sol emanating rays
• 
  Mars with a spear
• 
  Jupiter

  with a staff
• 
  Saturn with a scythe

The written symbols for Mercury, Venus, Jupiter, and Saturn have been traced to forms found in late Greek papyri.^[3][b]

Early forms are also found in medieval Byzantine codices which preserve horoscopes.^[4]

• 
  The symbol for the Moon in a medieval Byzantine (11th c.) ms. The appearance in late Classical times was similar.^[3]
• 
  The symbol for Mercury in late Classical (4th c.) and medieval Byzantine (11th c.) mss^[3]
• 
  The symbol for Venus in late Classical (4th c.) and medieval Byzantine (11th c.) mss^[3]
• 
  The disk with a ray as a symbol for the Sun in late Classical (4th c.) and medieval Byzantine (11th c.) mss^[3]
• 
  The symbol for Mars in late Classical (6th c.) and medieval Byzantine (11th c.) mss.^[3]
• 
  The symbol for Jupiter in late Classical (4th c.) and medieval Byzantine (11th c.) mss^[3]
• 
  The symbol for Saturn in late Classical (4th & 5th c.) and medieval Byzantine (11th c.) mss. Cf. kappa-rho, ⟨

  ρ⟩.^[3]

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 round shield in front of a diagonal spear, and the remaining classical planets by symbols resembling the modern ones, though without the crosshatch-marks seen in modern versions of Mercury, Venus, Jupiter and Saturn.^{[citation needed]} 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."^[5] 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.^[6]

• 
  Early modern depiction of the planet symbols in an alchemical context (Musaeum Hermeticum, 1678)
• 
  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, c. 1140, editio princeps by Erhard Ratdolt of Augsburg, 1489).
• 
  Depiction of the planets in a 15th-century Arabic manuscript of Abu Ma'shar's "Book of nativities"^[c]
• 
  Medieval

  classical planets

  . The planets are represented by seven faces.
• 
  16th-century mechanical clock + calendar, using the symbols of the eponymous planets for the days of the week.
• 
  Planetary-metal symbols at the center of the coat of arms of the Royal Society of Chemistry

Earth symbol

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 two lines, horizontal and vertical, representing the world divided by four rivers into the

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.

• 
  The Olympian gods, atop a -shaped world
• 
  Stylized Earth symbol

• 
  A simple globus cruciger
• 
  Three globi crucigeri in the coat of arms of Maschwanden in Switzerland
• 
  In the flag of Uppland, the globe of the globus cruciger is stylized as a T-and-O map,
• 
  In this globus cruciger, the cross is surmounted on a

  celestial orb

  with stars

Classical planets

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 ☾︎).

• 
  The Moon symbol, representing silver mining, in the municipal arms of Sala in Sweden
• 
  The Moon symbol in the municipal arms of Silvberg ('Silver Mountain') in Sweden
• 
  Stylized Moon symbol
• 
  The Moon for silver

Mercury

The symbol ☿ 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 crosshatch was added to the bottom of the staff to make it seem more Christian.^[3]

• 
  The god Hermes (Mercury) with his caduceus
• 
  The caduceus, copied from pottery
• 
  The caduceus in a tapestry, 3rd century
• 
  Mercury symbol, representing quicksilver mining, in the municipal coat of arms of Stahlberg, Rhineland-Palatinate, Germany.
• 
  Stylized Mercury symbol
• 
  Mercury for quicksilver

The ☿ symbol has also been used to indicate intersex, transgender, or non-binary gender.^[8] A related usage is for the 'worker' or 'neuter' sex among

Its Unicode

codepoint

is U+263F ☿ MERCURY.

Venus

The Venus symbol, ♀, consists of a circle with a small

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 though this is not certain.[3] In the Greek Oxyrhynchus Papyri 235, the symbols for Venus and Mercury did not have the cross on the bottom stem,^[3] and Venus still appears without the cross (⚲) in Johannes Kamateros (12th century).^{[citation needed]}

In botany and biology, the symbol for Venus is used to represent the female sex, alongside the symbol for Mars representing the male sex,^[13] following a convention introduced by Linnaeus in the 1750s.^[10][e] Arising from the biological convention, the symbol also came to be used in sociological contexts to represent

Unicode encodes the symbol as U+2640 ♀ FEMALE SIGN, in the Miscellaneous Symbols block.^[f]

• 
  A bronze mirror, of the type associated with Venus
• 
  Cupid holding up a similar mirror to Venus
• 
  The Venus symbol, representing copper mining, in the municipal coat of arms of Falun Municipality in Sweden (1932)
• 
  Raised fist within Venus symbol, used as a symbol of second-wave feminism (1960s)^[g]
• 
  Stylized Venus symbol
• 
  Venus for copper

Sun

The modern astronomical symbol for the Sun, the

for the Sun.

Bianchini's planisphere, produced in the 2nd century, shows a circlet with rays radiating from it.^[5][2] 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.^[18] This older symbol is encoded by

block. Both symbols have been used alchemically for gold, as have more elaborate symbols showing a disk with multiple rays or even a face.

• 
  A buckler with a sun symbol and dot at center
• 
  Stylized circumpunct symbol for the Sun
• 
  The Sun for gold
• 
  🜚, the medieval astronomical symbol for the Sun

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.^[19][20] It is also the old and

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.[18] The Greek Oxyrhynchus Papyri show a different symbol,^[3] perhaps simply a spear.^[2]

• 
  3rd-century coin with Mars on the reverse, with lance and shield. The same symbols were used for Athena (Pallas).
• 
  Mars with spear and shield, Pompeii.
• 
  The Mars symbol, representing iron mining, in the municipal coat of arms of Karlskoga in Sweden
• 
  The Mars symbol in the municipal coat of arms of Loppi in Finland
• 
  Mars symbol in the patch for NASA's Viking mission
• 
  Stylized Mars symbol. The spear partly crosses the shield.
• 
  Mars for iron

Its Unicode

is U+2642 ♂ MALE SIGN (♂).

Jupiter

The symbol for

, the Greek equivalent of Roman Jupiter).

Its Unicode

codepoint

is U+2643 ♃ JUPITER.

• 
  Jupiter and Saturn symbols in patch for NASA's Mariner Jupiter-Saturn mission
• 
  Stylized Jupiter symbol
• 
  Jupiter for tin
• 
  A modern form of the symbol that reflects its origin in the letter 'Z'

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.^[10] 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

is U+2644 ♄ SATURN.

• 
  Emblem of the

  magical order

  founded in 1926
• 
  The Saturn symbol representing lead in the municipal coat of arms of Bleiwäsche, since 1975 part of Bad Wünnenberg, North Rhine-Westphalia, Germany
• 
  Stylized Saturn symbol
• 
  Saturn for lead (Pb)

Modern discoveries

Uranus

The symbols for

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, ☉.^[21][22]

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").^[23] The platinum symbol tends to be used by astronomers and the monogram by astrologers.^[24]

For use in computer systems, the symbols are encoded U+26E2 ⛢ ASTRONOMICAL SYMBOL FOR URANUS and U+2645 ♅ URANUS.

• 
  The planetary symbols as rendered in 1784, including the newly discovered Uranus (left)^[21]
• 
  The Uranus platinum symbol on William Herschel's coat of arms (center, blue background)
• 
  Stylized Uranus monogram

Neptune

Several symbols were proposed for

Roman God Neptune^[25]

and the symbol of a trident,^[26] while falsely stating that this had been officially approved by the French Bureau des Longitudes.^[25] In October, he sought to name the planet Leverrier, after himself, and he had loyal support in this from the observatory director, François Arago,^[27] who in turn proposed a new symbol for the planet, .^[28] However, this suggestion met with resistance outside France,^[27] and French almanacs quickly reintroduced the name Herschel for Uranus, after that planet's discoverer Sir William Herschel, and Leverrier for the new planet,^[29] though it was used by anglophone institutions.^[30] Professor James Pillans of the University of Edinburgh defended the name Janus for the new planet, and proposed a key for its symbol.^[26] Meanwhile, Struve presented the name Neptune on December 29, 1846, to the Saint Petersburg Academy of Sciences.^[31] 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.^[32] The planetary symbol was

Neptune's trident, with the handle stylized either as a crosshatch , following Mercury, Venus, Jupiter, Saturn, and the asteroids, or as an orb , following the symbols for Uranus, Earth, and Mars.^[7]

The crosshatch 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.

• 
  Athena (Pallas) with her lance and Poseidon (Neptune) with his trident. These weapons became the symbols of the planets Pallas and Neptune, respectively.
• 
  Poseidon with a trident, 6th century BCE
• 
  Poseidon with a trident, 6th century CE
• 
  Stylized Neptune symbol (orb base)
• 
  Stylized Neptune symbol (cross base)
• 
  ⯉, the obsolete Le Verrier monogram for Neptune

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^[33] 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.

Wikimedia Commons has media related to Pluto symbols.

• 
  Pluto holding a bident
• 
  Pluto with a bident
• 
  Pluto symbol stylized as an inverted Mercury
• 
  Pluto compared in size to Earth's moon in a NASA publication

• 
  ⯖, an astrological symbol used for Pluto in Germany and Denmark, representing Pluto's orbit crossing Neptune's
• 
  ⯔, an astrological symbol used in the Mediterranean and Germany. The globe at bottom may be larger or omitted altogether.

Minor planets

In the 19th century, planetary symbols for the major

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.^[34]

In the late 20th century, astrologers abbreviated the symbol for 4 Vesta (the sacred fire of Vesta, encoded U+26B6 ⚶ VESTA),^[35] and introduced new symbols for

CHIRON).^[35] Chiron's symbol was adapted as additional centaurs were discovered; symbols for 5145 Pholus and 7066 Nessus have been encoded in Unicode.^[36]

The abbreviated Vesta symbol is now universal, and the astrological symbol for Pluto has been used astronomically for Pluto as a dwarf planet.[37]

In the early 21st century, symbols for the

Discordian symbol) were devised by Denis Moskowitz, a software engineer in Massachusetts.^[37][38]

Unicode characters for minor planets

			Code point
Ceres		Wikimedia Commons has media related to Ceres symbols.	(⚳) CERES at U+26B3.[39]
Pallas		Wikimedia Commons has media related to (2) Pallas symbols.	(⚴) PALLAS at U+26B4.[39]
Juno		Wikimedia Commons has media related to (3) Juno symbols.	(⚵) JUNO at U+26B5.[39]
Vesta		Wikimedia Commons has media related to (4) Vesta symbols.	(⚶) VESTA at U+26B6.[39]
Hygiea		Wikimedia Commons has media related to (10) Hygiea symbols.	(⯚) HYGIEA at U+2BDA.[39]
Chiron		Wikimedia Commons has media related to Chiron symbols.	(⚷) CHIRON at U+26B7.[39]
Pholus		Wikimedia Commons has media related to Pholus symbols.	(⯛) PHOLUS at U+2BDB
Nessus		Wikimedia Commons has media related to Nessus symbols.	(⯜) NESSUS at U+2BDC
Orcus		Wikimedia Commons has media related to Orcus symbols.	(🝿) ORCUS at U+1F77F
Haumea		Wikimedia Commons has media related to Haumea symbols.	(🝻) HAUMEA at U+1F77B
Quaoar		Wikimedia Commons has media related to Quaoar symbols.	(🝾) QUAOAR at U+1F77E
Makemake		Wikimedia Commons has media related to Makemake symbols.	(🝼) MAKEMAKE at U+1F77C
Gonggong		Wikimedia Commons has media related to Gonggong symbols.	(🝽) GONGGONG at U+1F77D
Eris		Wikimedia Commons has media related to Five-fingered hand of Eris.	(⯰) ERIS FORM ONE at U+2BF0
		Wikimedia Commons has media related to Eris astrological symbol.	(⯱) ERIS FORM TWO at U+2BF1, used by astrologer Henry Seltzer
Sedna		Wikimedia Commons has media related to Sedna symbols.	(⯲) SEDNA at U+2BF2

• 
  Ceres with her sickle
• 
  Athena (Pallas) with her lance (left)
• 
  Juno with her scepter
• 
  Vesta's sacred fire
• 
  Hygiea with her snake (old astr. symbol )
• 
  Petroglyph of Makemake
• 
  Orcus's gape
• 
  A human-headed serpent similar to depictions of Gonggong
• 
  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.^[40]

• 
  Astraea with her scales (astronomical symbol or )
• 
  Hebe bearing a cup (astr. symbol )
• 
  Iris as the rainbow (astr. symbol )
• 
  Flora dispensing flowers (astr. symbol )
• 
  Metis (astr. symbol )
• 
  Hygiea with her snake (astr. symbol )
• 
  Parthenope (astr. symbol )
• 
  Parthenope with her lyre (astr. symbol )
• 
  Victory (Victoria) with a laurel wreath (astr. symbol or )
• 
  Egeria (astr. symbol ) dictating the laws of Rome to Numa Pompilius
• 
  Peace (Irene) as a freed dove (astr. symbol )
• 
  Peace with wings and an olive branch
• 
  Eunomia (astr. symbol ) at left, as allegory of law and good order; Irene in centre
• 
  Psyche with butterfly wings (astr. symbol )
• 
  Psyche accompanied by a butterfly, and Hermes with a multiply twisted caduceus
• 
  Psyche with butterfly wings, and Charon standing in his lunate boat
• 
  Insignia of the NASA Psyche mission, possibly influenced by the Psyche symbol^[41]
• 
  Thetis with a dolphin (astro. symbol )
• 
  Melpomene with a dagger (astr. symbol )
• 
  Fortuna with her wheel (astro. symbol )
• 
  blindfolded Fortuna balanced on a wheel
• 
  Proserpina with a pomegranate (astr. symbol )
• 
  Bellona with a lance and flail (astro. symbol )
• 
  Amphitrite on a shell (astr. symbol )
• 
  Leukothea (astr. symbol ) as goddess of sailors
• 
  Faith (Fides, astr. symbol ) triumphs over idolatry

Moskowitz, who designed symbols for the trans-Neptunian dwarf planets, also designed symbols for the smaller trans-Neptunian objects Varuna, Ixion, and Salacia. Others have proposed symbols for even more trans-Neptunian objects, e.g. Zane Stein for Varda. Although mentioned in the Unicode proposal for the other dwarf planets, they lack broader adoption.^[37]

• 
  Salacia riding her

  hippocamp (symbol

  )
• 
  Ixion bound to his wheel (symbol or )
• 
  Varuna with his snake-lasso (symbol )
• 
  Varda kindling the stars (symbol )

See also

• Astrological symbol
• Astronomical symbol
• Gender symbol
• Classical planets in Western alchemy

Footnotes

1. ^ ^{a b} In order to have one-letter abbreviations for every planet, the IAU recommends 'H' (Hermes) for Mercury and 'M' for Mars. In the unlikely event a satellite were ever discovered around Mercury, its official abbreviation would be H1.
2. ^ "It is now possible to trace the medieval symbols for at least four of the five planets to forms that occur in some of the latest papyrus horoscopes ([ P.Oxy. ] 4272, 4274, 4275 [...]). Mercury's is a stylized caduceus. ... The ideal form of Mars' symbol is uncertain, and perhaps not related to the later circle with an arrow through it." — Jones (1999)^[3]
3. ^ BNF Arabe 2583 folio 15v: Saturn is shown as a black bearded man, kneeling and holding a scythe or axe; Mercury is shown as a scribe holding an open codex; Jupiter as a man of the law wearing a turban; Venus as a lute-player; Mars as a helmeted warrior holding a sword and the head of an enemy.
4. ^ "The symbol, the stylized hand mirror of the Goddess Venus, also represents femininity. It has also been used for the element copper: Mirrors had been manufactured from polished copper." — Rehder (2011)^[12]
5. ^ "In his Systema Naturae (Leyden, 1735) he [Linnaeus] used them with their traditional associations for metals. Their first biological use is in the Linnaean dissertation Plantae hybridae xxx sistit J.J. Haartman (1751) where in discussing hybrid plants Linnaeus denoted the supposed female parent species by the sign ♀, the male parent by the sign ♂, the hybrid by ☿: 'matrem signo ♀, patrem ♂ & plantam hybridam ☿ designavero'. In subsequent publications he retained the signs ♀ and ♂ for male and female individuals but discarded ☿ for hybrids; the last are now indicated by the multiplication sign ×."
   "Linnaeus's first general use of the signs of ♀ and ♂ was in his Species Plantarum (1753) written between 1746 and 1752 and surveying concisely the whole plant kingdom as then known. ... In order to save space Linnaeus employed the astronomical symbols of Saturn, Jupiter, Mars and the Sun to denote woody, herbaceous perennial, biennial and annual plants respectively [ed.: the orbital periods of Saturn, Jupiter, Mars and Earth about the Sun are 29, 12, 2, and 1 year] ... and Mercury, Mars and Venus for the hermaphrodite, male and female conditions" ...
   "Later, in his Mantissa Plantarum (1767) and Mantissa Plantarum altera (1771), Linnaeus regularly used ♂, ♀ and ☿ for male, female and hermaphrodite flowers respectively. Their aptness made them easy to remember and their convenience led to their general acceptance in zoology as well as botany. Koelreuter found them especially convenient when recording his experiments in hybridization; as late as 1778 he used the sign ☿ to denote a hybrid plant." — Stearn (1962)^[10]
6. ^ Glossed in the official Unicode code chart as " = Venus = alchemical symbol for copper → 1F469
   🚺
   women's symbol". ^[16]
7. ^ The raised fist symbol is attributed to Robin Morgan, in the 1960s: "Morgan designed the universal logo of the women's movement, the woman's symbol centered with a raised fist."^[17]

References

1. ^ The IAU Style Manual (PDF). 1989. p. 27.
2. ^ ^{a b c} "plaque; planisphère de Bianchini". Paris: Louvre. Retrieved 2022-07-23.
3. ^ ^{a b c d e f g h i j k l m} Jones, Alexander (1999). Astronomical Papyri from Oxyrhynchus: (P. Oxy. 4133-4300a). American Philosophical Society.
   ISBN 978-0-87169-233-7
   .
4. ^ Neugebauer, Otto (1975). A History of Ancient Mathematical Astronomy. pp. 788–789.
   ISBN 0-387-06995-X
   .
5. ^ ^{a b} Maunder (1934)
6. ^ Maunder (1934:239)
7. ^ ^{a b} "Solar System". The English Cyclopaedia of Arts and Sciences. Vol. VII–VIII. 1861.
8. ^ van den Akker, Olga B.A. (2012). Reproductive Health Psychology. Wiley-Blackwell. p. 40.
   ISBN 978-1-119-96747-7
   – via Google Books.
9. ^ Bingham, C. T. (1903). The Fauna of British India, Including Ceylon and Burma. Hymenoptera, Vol. II. Ants and Cuckoo-Wasps. London: Taylor and Francis. p. v.
10. ^
    JSTOR 1217734
    .
11. ^ Simpson, Niki (2010). "Botanical symbols: A new symbol set for new images".
    doi:10.1111/j.1095-8339.2009.01021.x
    .
12. ^ ^{a b} Rehder, Dieter (2011). Chemistry in Space: From interstellar matter to the origin of life. Wiley-VCH.
13. ^ ^{a b} Schott, G.D. (December 2005). "Sex symbols ancient and modern: their origins and iconography on the pedigree".
    PMID 16373733
    .
14. ^ Brammer, John Paul (2020-02-10). "Love / hate reads: Men are from Mars, Women are from Venus, revisited". VICE. Retrieved 2023-04-17.
15. ^ Morin, Amy (2016-08-19). "Why the Mars and Venus conversations must end: The truth about gender differences in the workplace". Forbes. Retrieved 2023-04-17.
16. ^ U+2640 (PDF). unicode.org (Report). Unicode code chart. Vol. U+26××.
    The Unicode Consortium
    .
17. ^ "Activism", robinmorgan.net, September 8, 2023. Retrieved 2024-01-02.
18. ^ ^{a b} Neugebauer, Otto; Van Hoesen, H.B. (1987). Greek Horoscopes. pp. 1, 159, 163.
19. ^ Maunder, A.S.D. (August 1934). "The origin of the symbols of the planets".
    Bibcode:1934Obs....57..238M
    .
20. ^ Evans, James (1998). The History & Practice of Ancient Astronomy. Oxford University Press/U.S. p. 350.
    ISBN 0-19-509539-1
    .
21. ^ ^{a b}
    Bibcode:1784vdne.book.....B
    – via Internet Archive.
22. ^ Gould, B.A. (1850). Report on the history of the discovery of Neptune. Smithsonian Institution. p. 5 – via Archive.org.
23. ^ Herschel, Francisca (August 1917). "The meaning of the symbol H+o for the planet Uranus".
    Bibcode:1917Obs....40..306H
    .
24. ^ Iancu, Laurentiu (14 August 2009). Proposal to encode the astronomical symbol for Uranus (PDF). unicode.org (Report).
    The Unicode Consortium
    . L2009/09300.
25. ^ ^{a b} Littmann, Mark; Standish, E.M. (2004). Planets Beyond: Discovering the outer Solar System. Courier Dover Publications. p. 50.
    ISBN 0-486-43602-0
    .
26. ^ ^{a b} Pillans, James (1847). "Ueber den Namen des neuen Planeten" [Regarding the names of the new planets].
    doi:10.1002/asna.18470252602
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35. ^ ^{a b} Faulks, David (9 May 2006). Proposal to add some western astrology symbols to the UCS (PDF). unicode.org (Report).
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39. ^ ^{a b c d e f} In the official code chart.
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