This article needs additional citations for verification. (November 2016)
U+1F728 🜨 ALCHEMICAL SYMBOL FOR VERDIGRIS
U+2641 ♁ EARTH (Globus cruciger)
U+2637 ☷ TRIGRAM FOR EARTH
U+1F703 🜃 ALCHEMICAL SYMBOL FOR EARTH
|Different from||U+23DA ⏚ EARTH GROUND|
Electrical earth (ground)
A variety of symbols or iconographic conventions are used to represent Earth, whether in the sense of planet Earth, or the inhabited world, or as a classical element. A circle representing the round world, with the rivers of Garden of Eden separating the four corners of the world, or rotated 45° to suggest the four continents, remains a common pictographic convention to express the notion of "worldwide". The current astronomical symbol for the planet is a circle with an intersecting cross, . Although the International Astronomical Union (IAU) now discourages the use of planetary symbols, this is an exception, being used in abbreviations such as M🜨 for Earth mass.
Before the recognition of the spherical shape of the Earth in the Hellenistic period, the main attribute of the Earth was its being flat. The Egyptian hieroglyph for "earth, land" depicts a stretch of flat alluvial land with grains of sand (Gardiner N16: 𓇾). The Sumerian cuneiform sign for "earth, place" KI (𒆠) originates as a picture of a "threshing floor", and the Chinese character (土) originated as a lump of clay on a potting wheel.
Earth, the classical element
The Western (early modern) alchemical symbol 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.
In the Roman period, the globe, a representation of the spherical Earth, became the main symbol representing the concept. The globe depicted the "universe" (pictured as the celestial sphere) as well as the Earth.
The globus cruciger (♁) is the globe surmounted by a Christian cross, held by Byzantine Emperors on the one hand to represent the Christian ecumene, 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 of the three classical continents of the Old World, viz. Asia, Europe and Africa.
Unicode has introduced a four characters representing the "globe" in the Miscellaneous Symbols and Pictographs block:
- EARTH GLOBE EUROPE-AFRICA U+1F30D 🌍
- EARTH GLOBE AMERICAS U+1F30E 🌎
- EARTH GLOBE ASIA-AUSTRALIA U+1F30F 🌏
- GLOBE WITH MERIDIANS U+1F310 🌐
- Planet symbols – Graphical symbols used in astrology and astronomy
- Solar symbol – Symbol representing the Sun
- Earth in culture – Cultural perspectives about Earth
- Radical 32 – Kangxi radical meaning 'earth'
- Terra (mythology) – Roman deity: Mother Earth
- Atlas (mythology) – Deity in Greek mythology who held up the door or sky
- Electrical earth – Reference point in an electrical circuit from which voltages are measured
- Sun cross – Circle containing four or more spokes
- T and O map – Type of medieval world map
- Astrological sign#Polarity and the four elements – Twelve 30° sectors of the ecliptic, as defined by Western astrology
|Wikimedia Commons has media related to Earth symbols.|