A variety of

symbol A symbol is a mark, Sign (semiotics), sign, or word that indicates, signifies, or is understood as representing an idea, physical object, object, or wikt:relationship, relationship. Symbols allow people to go beyond what is known or seen by cr ...

s or iconographic conventions are used to represent

Earth Earth is the third planet from the Sun and the only astronomical object known to Planetary habitability, harbor life. This is enabled by Earth being an ocean world, the only one in the Solar System sustaining liquid surface water. Almost all ...

, whether in the sense of

planet Earth Earth is the third planet from the Sun and the only astronomical object known to harbor life. This is enabled by Earth being an ocean world, the only one in the Solar System sustaining liquid surface water. Almost all of Earth's water is ...

, or the inhabited world, or as a

classical element The classical elements typically refer to Earth (classical element), earth, Water (classical element), water, Air (classical element), air, Fire (classical element), fire, and (later) Aether (classical element), aether which were proposed to ...

. A circle representing the round world, with the rivers of

Garden of Eden In Abrahamic religions, the Garden of Eden (; ; ) or Garden of God ( and ), also called the Terrestrial Paradise, is the biblical paradise described in Genesis 2–3 and Ezekiel 28 and 31.. The location of Eden is described in the Book of Ge ...

separating the

four corners of the world Several cosmological and mythological systems portray four corners of the world or four quarters of the world corresponding approximately to the four points of the compass (or the two solstices and two equinoxes). At the center may lie a sacred ...

, or rotated 45° to suggest the

four continents Europeans in the 16th century divided the world into four continents: Africa, America, Asia, and Europe. Each of the four continents was seen to represent its quadrant of the world—Africa in the south, America in the west, Asia in the east, a ...

, remains a common pictographic convention to express the notion of "worldwide". The current

astronomical symbol Astronomical symbols are abstract pictorial symbols used to represent astronomical objects, theoretical constructs and observational events in Western culture, European astronomy. The earliest forms of these symbols appear in Greek papyrus tex ...

s for the planet are a circle with an intersecting cross, 20px, 🜨, alt=An equilateral cross enclosed in a circle, and a ''

globus cruciger The for, la, globus cruciger, cross-bearing orb, also known as ''stavroforos sphaira'' () or "the orb and cross", is an Sphere, orb surmounted by a Christian cross, cross. It has been a Christian Church, Christian symbol of authority since the M ...

'', 20px, ♁. Although the

International Astronomical Union The International Astronomical Union (IAU; , UAI) is an international non-governmental organization (INGO) with the objective of advancing astronomy in all aspects, including promoting astronomical research, outreach, education, and developmen ...

(IAU) now discourages the use of

planetary symbol Planetary symbols are used in astrological symbol, astrology and traditionally in astronomical symbol, astronomy to represent a classical planet (which includes the Sun and the Moon) or one of the modern planets. The classical symbols were also use ...

s, this is an exception, being used in abbreviations such as ''M''_🜨 or ''M''_♁ for

Earth mass An Earth mass (denoted as ''M''🜨, ''M''♁ or ''M''E, where 🜨 and ♁ are the astronomical symbols for Earth), is a unit of mass equal to the mass of the planet Earth. The current best estimate for the mass of Earth is , with a relative ...

History

The earliest type of symbols are

allegories As a literary device or artistic form, an allegory is a narrative or visual representation in which a character, place, or event can be interpreted to represent a meaning with moral or political significance. Authors have used allegory throughou ...

, personifications or deifications, mostly in the form of an

Earth goddess Earth is the third planet from the Sun and the only astronomical object known to Planetary habitability, harbor life. This is enabled by Earth being an ocean world, the only one in the Solar System sustaining liquid surface water. Almost all ...

(in the case of

Egyptian mythology Egyptian mythology is the collection of myths from ancient Egypt, which describe the actions of the Egyptian pantheon, Egyptian gods as a means of understanding the world around them. The beliefs that these myths express are an important part ...

a god, Geb). Before the recognition of the spherical shape of the Earth in the

Hellenistic period In classical antiquity, the Hellenistic period covers the time in Greek history after Classical Greece, between the death of Alexander the Great in 323 BC and the death of Cleopatra VII in 30 BC, which was followed by the ascendancy of the R ...

, the main attribute of the Earth was its being ''flat''. The

Egyptian hieroglyph Ancient Egyptian hieroglyphs ( ) were the formal writing system used in Ancient Egypt for writing the Egyptian language. Hieroglyphs combined ideographic, logographic, syllabic and alphabetic elements, with more than 1,000 distinct characters. ...

for "earth, land" depicts a stretch of flat alluvial land with grains of sand (

Gardiner Gardiner may refer to: Places Settlements ;Canada * Gardiner, Ontario ;United States * Gardiner, Maine * Gardiner, Montana * Gardiner (town), New York ** Gardiner (CDP), New York * Gardiner, Oregon * Gardiner, Washington * West Gardiner, ...

N16: 𓇾). The Sumerian cuneiform sign for "earth, place" KI (𒆠) originates as a picture of a "threshing floor", and the

Chinese character Chinese characters are logographs used to write the Chinese languages and others from regions historically influenced by Chinese culture. Of the four independently invented writing systems accepted by scholars, they represent the only on ...

(土) originated as a lump of clay on a potting wheel.

Earth, the classical element

In Chinese mysticism, the classical element "Earth" is represented by the

trigram Trigrams are a special case of the ''n''-gram, where ''n'' is 3. They are often used in natural language processing for performing statistical analysis of texts and in cryptography for control and use of ciphers and codes. See results of analysi ...

of three broken lines in the ''

I Ching The ''I Ching'' or ''Yijing'' ( ), usually translated ''Book of Changes'' or ''Classic of Changes'', is an ancient Chinese divination text that is among the oldest of the Chinese classics. The ''I Ching'' was originally a divination manual in ...

'' (☷). The Western (early modern)

alchemical symbol Alchemical symbols were used to denote chemical elements and compounds, as well as alchemy, alchemical apparatus and processes, until the 18th century. Although notation was partly standardized, style and symbol varied between alchemists. Lüdy ...

for earth is a downward-pointing triangle bisected by a horizontal line (🜃). Other symbols for the earth in alchemy or mysticism include the square and the serpent.

The planet

In the

Roman period The Roman Empire ruled the Mediterranean and much of Europe, Western Asia and North Africa. The Roman people, Romans conquered most of this during the Roman Republic, Republic, and it was ruled by emperors following Octavian's assumption of ...

, the

globe A globe is a spherical Earth, spherical Model#Physical model, model of Earth, of some other astronomical object, celestial body, or of the celestial sphere. Globes serve purposes similar to maps, but, unlike maps, they do not distort the surface ...

, a representation of the spherical Earth, became the main symbol representing the concept. The globe depicted the "universe" (pictured as the

celestial sphere In astronomy and navigation, the celestial sphere is an abstract sphere that has an arbitrarily large radius and is concentric to Earth. All objects in the sky can be conceived as being projected upon the inner surface of the celestial sphere, ...

) as well as the Earth. Diagrammatic T-O world map - 12th c

The

(♁) is the globe surmounted by a

Christian cross The Christian cross, seen as representing the crucifixion of Jesus, is a religious symbol, symbol of Christianity. It is related to the crucifix, a cross that includes a ''corpus'' (a representation of Jesus' body, usually three-dimensional) a ...

, held by

Byzantine Emperors The foundation of Constantinople in 330 AD marks the conventional start of the Eastern Roman Empire, which Fall of Constantinople, fell to the Ottoman Empire in 1453 AD. Only the emperors who were recognized as legitimate rulers and exercised s ...

on the one hand to represent the

Christian A Christian () is a person who follows or adheres to Christianity, a Monotheism, monotheistic Abrahamic religion based on the life and teachings of Jesus in Christianity, Jesus Christ. Christians form the largest religious community in the wo ...

ecumene In ancient Greece, the term ''oecumene'' ( UK) or ''ecumene'' ( US; ) denoted the known, inhabited, or habitable world. In Greek antiquity, it referred to the portions of the world known to Hellenic geographers, subdivided into three continents ...

, on the other hand the akakia represented the mortal nature of all men. In the medieval period, the known world was also represented by the T-and-O figure, representing an extremely simplified

world map A world map is a map of most or all of the surface of Earth. World maps, because of their scale, must deal with the problem of projection. Maps rendered in two dimensions by necessity distort the display of the three-dimensional surface of t ...

of the three classical continents of the

Old World The "Old World" () is a term for Afro-Eurasia coined by Europeans after 1493, when they became aware of the existence of the Americas. It is used to contrast the continents of Africa, Europe, and Asia in the Eastern Hemisphere, previously ...

, viz. ''

Asia Asia ( , ) is the largest continent in the world by both land area and population. It covers an area of more than 44 million square kilometres, about 30% of Earth's total land area and 8% of Earth's total surface area. The continent, which ...

Europe Europe is a continent located entirely in the Northern Hemisphere and mostly in the Eastern Hemisphere. It is bordered by the Arctic Ocean to the north, the Atlantic Ocean to the west, the Mediterranean Sea to the south, and Asia to the east ...

'' and ''

Africa Africa is the world's second-largest and second-most populous continent after Asia. At about 30.3 million km2 (11.7 million square miles) including adjacent islands, it covers 20% of Earth's land area and 6% of its total surfac ...

'' (in various orientations: 🜖, , ⦺, file:T-and-O map symbol.svg). Unicode encodes four characters representing the globe in the

Miscellaneous Symbols and Pictographs Miscellaneous Symbols and Pictographs is a Unicode block containing meteorological and astronomical symbols, emoji characters largely for compatibility with Japanese telephone carriers' implementations of Shift JIS, and characters originally from ...

block: *EARTH GLOBE EUROPE-AFRICA U+1F30D *EARTH GLOBE AMERICAS U+1F30E *EARTH GLOBE ASIA-AUSTRALIA U+1F30F *GLOBE WITH MERIDIANS U+1F310

References

External links

{{Earth Alchemical symbols Astronomical symbols

Symbol A symbol is a mark, Sign (semiotics), sign, or word that indicates, signifies, or is understood as representing an idea, physical object, object, or wikt:relationship, relationship. Symbols allow people to go beyond what is known or seen by cr ...

History

Earth, the classical element

The planet

See also

References

External links