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Earth is the planet we live on, one of eight planets in our solar system and the only known place in the universe to support life.

Earth is the third planet from the sun, after Mercury and Venus, and before Mars. It is about 150 million kilometers (about 93 million miles) from the sun.

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This distance, called an astronomical unit (AU), is a standard unit of measurement in astronomy. Earth is one AU from the sun. The planet Jupiter is about 5.2 AU from the sun—about 778 million kilometers (483.5 million miles).

Earth is the largest and most massive of the rockyinner planets, although it is dwarfed by the gas giants beyond the Asteroid Belt.

Earth is a geological oddball in our solar system. This is why.

Its diameter is about 12,700 kilometers (7,900 miles), and its mass is about 5.97×1024 kilograms (6.58×1021 tons). In contrast, Jupiter, the largest planet in the solar system, has a diameter of 143,000 kilometers (88,850 miles), and its mass is about 1,898×1024 kilograms (2093×1021 tons).

Earth is an oblate spheroid. This means it is sp Earth: The Biography - Iain S.

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