![]() īefore the recognition of the spherical shape of the Earth in the Hellenistic period, the main attribute of the Earth was its being flat. The earliest type of symbols are allegories, personifications or deifications, mostly in the form of an Earth goddess (in the case of Egyptian mythology a god, Geb). ![]() 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. The current astronomical symbol for the planet is a circle with an intersecting cross. 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". ![]() U+1F728 □ ALCHEMICAL SYMBOL FOR VERDIGRISĪ 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.
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