Earth from Apollo 17
"Blue Marble" photo of Earth, from Apollo 17 in 1972.

Other Designations

Sol III, Terra

Orbital Distance from Sol:

93 million miles (Approx. 1 AU)


North and South America, Africa, Australia, Asia, Europe, Antarctica


Atlantic, Pacific, Indian, and Arctic Oceans



Major Space Agencies:


Largest Country:


Human Population:

(as of 2011) 7.2 billion

Highest Mountain:

(as of 2011) Mount Everest - Height 29,000 ft

Current Age:

Between 9 and 12 thousand years

Earth is the home of the human race, as well as the third and only habitable planet in the Sol System.


It is the only habitable planet within the Sol System, and the only known suitable for life in the universe for humans. Earth's age is not entirely known, but humans continually debate its age, though many think it as being anywhere from 6 to 12,000 years old. Earth has seven major continents and four major oceans. It constantly weathers natural disasters, from hurricanes, earthquakes, and volcanic eruptions, to impact events from scattered asteroids and comets. It also has a manmade planetary 'ring' of sorts, composed of large groups of manmade satellites that circle the planet at various orbital distances, mainly communication and weather satellites, as of 2012.


Early History

Great Catastrophe of Early Earth

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