Earth, also known as Terra, and Tellus mostly in the 19th century, 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. Scientific evidence indicates that 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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The Earth seen from Apollo 17
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Another version of The Blue
Marble
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Earth flag
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Earthrise over the Moon
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Planet Earth with core exposed
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Planet Earth with core exposed 2
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First image taken by humans of the whole Earth
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Rotating Earth
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Earth Western Hemisphere
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