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A color image of Earth as seen from Apollo 17. We can see Africa, Antarctic and the Indian Ocean

The Earth is our planet. At the moment, it's the only planet with life because it has a dense atmosphere of nitrogen and oxygen. The predominant colour is the blue, because it is tree-quarters covered by oceans. It is believed to have formed about 4,600 millions years ago.

Description[edit | edit source]

The Earth is the third planet from the Sun in the Solar System. It is orbiting between Venus and Mars at an average distance of 149.6 millions km. The Earth also has one satellite, which is the Moon and has an equatorial diameter of 12,756 km across it.

The structure of the Earth[edit | edit source]

The inside of the Earth is separated in five layer:

The movements of the Earth[edit | edit source]

The Earth has two movements: it rotates around its axis and orbits around the Sun.

The Moon[edit | edit source]

The Earth has one satellite, the Moon.

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