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8 images of Earth as seen from space

March 7, 2011, 12:25 p.m.
The earth as seen from space

Photo: NASA

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The whole Earth

Third in a line of planets from the Sun, Earth looks like a delicate blue marble in the middle of indescribable darkness. A mixture of blues, browns, whites and greens, it is the fifth-largest planet in our solar system. An estimated 4.54 billion years old, Terra (as it is known in Latin) harbors the only known life in the neighborhood. Until the 20th century, we were never able to see our planet and its place in space. Now we can appreciate the view of our home as seen by astronauts, satellites and who knows what else. (Text: Katherine Butler)