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Earth, also known as the Earth or Terra, is the planet on which we live, the third planet outward from the Sun.

It is the largest of the solar system's terrestrial planets, and the only planetary body that modern science confirms as harbouring life. The planet formed around 4.5 billion (4.5×10⁹) years ago and shortly thereafter acquired its single natural satellite, the Moon.

Its symbol consists of a circled cross, representing a meridian and the equator; a variant puts the cross atop the circle ( Unicode: ⊕ or ♁).

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Earth (classical element)Earth is one of the four classical elements in ancient Greek philosophy and science. Earth is considered to be both cold and dry, and according to Plato is associated with the cube. Earth is, not surprisingly, the element seen as denoting material possess EarthEarth also known as the Earth or Terra is the planet on which we live, the third planet outward from the Sun. It is the largest of the solar system's terrestrial planets, and the only planetary body that modern science confirms as harbouring life. The pla EarthdawnEarthdawn is a fantasy role-playing game produced originally by FASA. It has since been licensed to Living Room Games, which produced the second edition, and RedBrick Limited, a company that is producing the 'Classic' line. The game is similar to fantasy Earth Liberation FrontThe Earth Liberation Front ELF is a loosely-knit eco-defense (friendly term) or eco-terrorist (unfriendly term) organization that, according to the ELF, "uses direct action in the form of economic sabotage to stop the exploitation and destruction of the n EarthwormEarthworm is the common reference for the larger members of the Oligochaeta (which is either a class or subclass depending on the author) in the phylum Annelida. In classical systems they were placed in the order Opisthopora on the basis of the male pores EarthquakeAn earthquake is a trembling or shaking movement of the Earth's surface. Earthquakes typically result from the movement of faults, quasi-planar zones of deformation within its uppermost layers. The word earthquake is also widely used to indicate the sourc Earth terminal complex Earth observation satellite Earthling Earth science Earth: Final Conflict Earth sheltering Earth Summit 2002 Earth Simulator Earth orbit