Earth - Lexicography

Earth, also known as Terra, and Tellus mostly in the 19th century, is the third-closest planet to the Sun. It is the largest of the solar system's terrestrial planets, and the only planetary body that modern science confirms as harboring life. Scientific evidence indicates that the planet formed around 4.57 billion (4.57×109) years ago, and shortly thereafter (4.533 billion years ago) acquired its single natural satellite, the Moon. Earth - Lexicography. Its astronomical symbol con ...

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• Earth - Lexicography
• Earth - Physical characteristics
• Earth - Earth in the solar system
• Earth - The Moon
• Earth - Geography
• Earth - Environment and Ecosystem
• Earth - Climate
• Earth - Terrain
• Earth - Natural resources
• Earth - Land use
• Earth - Natural and environmental hazards
• Earth - Human geography
• Earth - Descriptions of Earth

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Its astronomical symbol consists of a circled cross, representing a meridian and the equator; a variant puts the cross atop the circle (Unicode: ⊕ or ♁). Besides words derived from Terra, such as terrestrial, terms that refer to the Earth include tellur- (telluric, tellurian, from the Roman goddess Tellūs) and geo- (geocentric, geo ...

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Earth, Earth - Lexicography, Earth - Physical characteristics, Earth - Earth in the solar system, Earth - The Moon, Earth - Geography, Earth - Environment and Ecosystem, Earth - Climate, Earth - Terrain, Earth - Natural resources, Earth - Land use, Earth - Natural and environmental hazards, Earth - Human geography, Earth - Descriptions of Earth

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It takes the Earth 23 hours, 56 minutes and 4.091 seconds (1 sidereal day) to rotate around the axis connecting the north pole and the south pole. From Earth the main apparent motion of celestial bodies in the sky (except meteors which are within the atmosphere and low-orbiting satellites) is the movement to the west at a rate of 15 °/h = 15'/min, i.e., a Sun or Moon diameter every two minutes. Earth orbits the Sun every 365.2564 mean solar days (1 sidereal year). From Earth, this gives an apparent movement of the Sun with respect to the stars at a rate of ca. 1 °/day, i. ...

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Earth, Earth - Lexicography, Earth - Physical characteristics, Earth - Earth in the solar system, Earth - The Moon, Earth - Geography, Earth - Environment and Ecosystem, Earth - Climate, Earth - Terrain, Earth - Natural resources, Earth - Land use, Earth - Natural and environmental hazards, Earth - Human geography, Earth - Descriptions of Earth

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Map references: Time Zones, Coordinates. Biggest geographic subdivision Continents, Oceans Area: Total: 510.073 million km2 land: 148.94 million km2 Water: 361.132 million km2 Note: 70.8 % of the world's surface is covered by water, 29.2 % is exposed land Land boundaries: the land boundaries in the world total 251,480 km (not counting shared boundaries twice) Coas ...

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Earth, Earth - Lexicography, Earth - Physical characteristics, Earth - Earth in the solar system, Earth - The Moon, Earth - Geography, Earth - Environment and Ecosystem, Earth - Climate, Earth - Terrain, Earth - Natural resources, Earth - Land use, Earth - Natural and environmental hazards, Earth - Human geography, Earth - Descriptions of Earth

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Earth is the only place in the universe where life is known to exist. The planet's lifeforms are sometimes said to form a "biosphere". This biosphere is generally believed to have begun evolving about 3.5 billion (3.5×109) years ago. The biosphere is divided into a number of biomes, inhabited by broadly similar flora and fauna. On land, biomes are separated primarily by latitude. Terrestrial biomes lying within the Arctic and Antarctic Circles are relatively barren of plant and animal life, while most of the more populous biomes ...

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Earth, Earth - Lexicography, Earth - Physical characteristics, Earth - Earth in the solar system, Earth - The Moon, Earth - Geography, Earth - Environment and Ecosystem, Earth - Climate, Earth - Terrain, Earth - Natural resources, Earth - Land use, Earth - Natural and environmental hazards, Earth - Human geography, Earth - Descriptions of Earth

Read more here: » Earth: Encyclopedia II - Earth - Environment and Ecosystem

See also: Geology The Earth consists of several atmospheric, hydrologic, and mainly geologic layers. Its components are the atmosphere, the hydrosphere, the crust, the mantle, and its core. The biosphere is a tiny layer in this composition and is usually not considered part of the physical layers of the Earth. The geologic component layers of the Earth are located at the following depths below surface: 0 to 60 km - Lithosphere (locally varies between 5 and 200 km) 0 to 35 km - Crust (locally varies between ...

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Earth, Earth - Lexicography, Earth - Physical characteristics, Earth - Earth in the solar system, Earth - The Moon, Earth - Geography, Earth - Environment and Ecosystem, Earth - Climate, Earth - Terrain, Earth - Natural resources, Earth - Land use, Earth - Natural and environmental hazards, Earth - Human geography, Earth - Descriptions of Earth

Read more here: » Earth: Encyclopedia II - Earth - Physical characteristics

Earth has often been personified as a deity, in particular a goddess (see Gaia and Mother Earth). The Chinese earth goddess Hu-Tu is similar to Gaia, the deification of the earth. As the patroness of fertility, her element is earth. In Norse mythology, the earth goddess Jord was the mother of Thor and the daughter of Annar. Since Earth is rather large, it is not immediately obvious to the naked eye viewing from the surface that it is an oblate spheroid, bulging slightly at the equator and slightly flattened at the poles. In the ...

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Earth, Earth - Lexicography, Earth - Physical characteristics, Earth - Earth in the solar system, Earth - The Moon, Earth - Geography, Earth - Environment and Ecosystem, Earth - Climate, Earth - Terrain, Earth - Natural resources, Earth - Land use, Earth - Natural and environmental hazards, Earth - Human geography, Earth - Descriptions of Earth

Read more here: » Earth: Encyclopedia II - Earth - Descriptions of Earth