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Everyone who ever lived was born on the Earth. + People disagree about when and how the Earth was created.
{{Solarsystem}}
{{Solarsystem}}
[[Image:Artw 17.jpg|right|thumb|View of the Earth as seen by the Apollo 17 crew traveling toward the moon. This translunar coast photograph extends from the Mediterranean Sea area to the Antarctica south polar ice cap. This is the first time the Apollo trajectory made it possible to photograph the south polar ice cap. Note the heavy cloud cover in the Southern Hemisphere. Almost the entire coastline of Africa is clearly visible. The Arabian Peninsula can be seen at the northeastern edge of Africa. The large island off the coast of Africa is the Malagasy Republic. The Asian mainland is on the horizon toward the northeast.]]
[[Image:Artw 17.jpg|right|thumb|View of the Earth as seen by the Apollo 17 crew traveling toward the moon. This translunar coast photograph extends from the Mediterranean Sea area to the Antarctica south polar ice cap. This is the first time the Apollo trajectory made it possible to photograph the south polar ice cap. Note the heavy cloud cover in the Southern Hemisphere. Almost the entire coastline of Africa is clearly visible. The Arabian Peninsula can be seen at the northeastern edge of Africa. The large island off the coast of Africa is the Malagasy Republic. The Asian mainland is on the horizon toward the northeast.]]
The '''Earth''' is the third planet from the Sun. It is approximately 8,000 miles (13,000 km) in diameter, which means that its equatorial circumference (measured around the equator) is 24,901 miles (40,075 kilometers), and the polar circumference is slightly less at 24,809 miles (40,008 km).[http://geography.about.com/library/faq/blqzcircumference.htm] The reason its metric circumference is so close to the "round number" of 40,000 is that the [[kilometer]] was defined (by the French) as 1/10,000th the distance from the equator to the [[North Pole]].
The '''Earth''' is mankind's home. Everyone who ever lived was born on the Earth.
People disagree about when and how the Earth was created. The three most popular ideas are:
#That God created the Earth several hundred generations ago, as recounted in [[Genesis]. By counting generations and years in [[Old Testament]] chronologies, one can calculate the age of the Earth as approximately 6,000 years (see [[age of the Earth]] and [[Young Earth Creationism]]).
#That God created the Earth billions of years ago (see [[Old Earth Creationism]]).
#That the Earth came into existence billions of years ago, but entirely through natural processes and without any intervention by God
Clashes between adherents of these ideas have gone on since time immemorial (see [[origins debate]]).
Within the [[solar system]], Earth is the third planet from the Sun. It is approximately 8,000 miles (13,000 km) in diameter, which means that its equatorial circumference (measured around the equator) is 24,901 miles (40,075 kilometers), and the polar circumference is slightly less at 24,809 miles (40,008 km).[http://geography.about.com/library/faq/blqzcircumference.htm] The reason its metric circumference is so close to the "round number" of 40,000 is that the [[kilometer]] was defined (by the French) as 1/10,000th the distance from the equator to the [[North Pole]].
Its surface area is approximately 4·π (4000 mi)<sup>2</sup> = 200 million square miles (510 million km<sup>2</sup>). It has been said that Earth should really be called "water", as the larger part of it—about 70%—is covered by water. In fact, the Pacific and Indian oceans alone cover about half of the Earth's surface.
Its surface area is approximately 4·π (4000 mi)<sup>2</sup> = 200 million square miles (510 million km<sup>2</sup>). It has been said that Earth should really be called "water", as the larger part of it—about 70%—is covered by water. In fact, the Pacific and Indian oceans alone cover about half of the Earth's surface.