Earth

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Earth, also known as the Earth, Terra, and (mostly in the 19th century) Tellus, is the third-closest planet to the Sun. It is the largest of the solar system's terrestrial planets, and the only planetary body that modern science confirms as harboring life. The planet formed around 4.57 billion (4.57?109) years ago, and shortly thereafter (4.533 billion years ago) acquired its single natural satellite, the Moon.

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Its astronomical symbol consists of a circled cross, representing a meridian and the equator; a variant puts the cross atop the circle (Unicode: ⊕ or ♁). Besides words derived from Terra, such as terrestrial, terms that refer to the Earth include tellur- (telluric, tellurian, from the Roman goddess Tell?s) and geo- (geocentric, geothermal (from the Greek goddess Gaia).

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Terra: Terra may mean:...

19th century: :Alternative meaning: Nineteenth Century (periodical)...

Tellus: Tellus is a Latin word meaning "earth" and may refer to:...

Earth related Images and Photos (experimental)

Earth	Earth	Earth	Earth
Earth	Earth II (DVD)	Earth Music	Good Earth, The (DVD)
Earth: The Biography (BD)	Earth: The Biography (DVD)	Earth Angel I	Earth Men Rise!