Earth

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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.

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

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.

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This article is issued from Vikidia - version of the Monday, March 14, 2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.