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The World

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The World

BACKGROUND The Earth from Space

Information: The World is Planet Earth and all life on it.

The English word "World" comes from the Old English "weorold," a compound of "wer" (man) and "eld" (age), which thus means roughly "Age of Man."

The World is the third planet from the Sun and the only astronomical object known to harbor life. According to radiometric dating and other evidence, the World formed over 4.5 billion years ago. The World's gravity interacts with other objects in space, especially the Sun and the Moon, which is Earth's only natural satellite. The world orbits around the Sun in 365.256 solar days.

The history of the World is commonly understood as the history of humanity spanning the major geopolitical developments of about five millennia, from the first civilizations to the present. The World's population is the sum of all human populations at any time; similarly, the World economy is the sum of the economies of all societies or countries.

The World's long-term future is tied to that of the Sun. The Sun will evolve to become a red giant in about five billion years, during which life will be destroyed by the Sun's increased luminosity.

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