Earth 3D by RaccoonAnimator on DeviantArt
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Earth 3D by RaccoonAnimator on DeviantArt
Earth Astronomical symbol of EarthThe particular Blue Marble, the first full-view photograph of the planet, was captured by astronauts en route to the Moon in 1972
Earth is the 3 rd planet from the sunlight and the only astronomical item known to harbor life. In accordance with radiometric dating and some other sources of evidence, Earth formed over 4. 5 billion years ago. Earth's gravity treats other things in space, especially the Sun and the Celestial body overhead, Earth's only natural satellite television. Earth revolves around sunlight in 365. 26 times, a period known as an Earth year. During this time, Earth rotates about its axis about 366. 26 times.
Earth's axis of rotation is tilted with respect to its orbital plane, producing seasons on the planet. The gravitational interaction between Earth and the Moon causes sea tides, stabilizes Earth's positioning on its axis, and progressively slows its rotator. Earth is the densest planet in the Sun System and the greatest of the four terrestrial planets.
Earth's lithosphere is divided into several firm tectonic plates that move across the surface over periods of many hundreds of thousands of years. About 71% of Earth's surface is covered with water, mostly by oceans. The remaining 29% is land including areas and islands that collectively have many lakes, streams and other sources of water that contribute to the hydrosphere. Nearly all Earth's polar regions are protected in ice, like the Antarctic ice sheet and the sea ice of the Arctic ice pack. Globe's interior remains active with a solid iron interior core, a liquid outer core that generates the Earth's magnetic field, and a convecting mantle that drives plate tectonics.
Inside the first billion years of Earth's history, life appeared in the seas and began to influence the Earth's atmosphere and surface, leading to the proliferation of aerobic and anaerobic organisms. Some geological evidence indicates that life might have arisen as much as 4. 1 billion dollars years ago. Since then, the combo of Globe's distance from the Sun, physical properties, and geological history have allowed life to evolve and prosper. In the great the Earth, biodiversity has gone through long periods of expansion, occasionally punctuated by mass extinction events. More than 99% of all species that ever lived on Earth are extinct. Estimates of the number of species on Earth today vary extensively; most species have not been described. Over several. 6 billion humans live on Earth and depend upon its biosphere and natural resources for their success.[40] Humans are suffering from diverse societies and cultures; politically, the world has about 200 sovereign says.
The current English word World developed from a broad variety of Middle The english language forms, which derived from an Old English noun most often spelled eorðe. This has cognates in most Germanic language, and their proto-Germanic root has been reconstructed as *erþō. In its earliest appearances, eorðe was already being used to translate the many senses of Latin terra and Greek γῆ (gē): the earth, their soil, dry land, your world, the surface of the world (including the sea), and the world itself. As with Terra and Gaia, Earth was a personified goddess in Germanic paganism: the Angles were posted by Tacitus as among the devotees of Nerthus, and later Norse mythology included Jörð, a giantess often given as the mother of Thor.
Originally, planet was written in lowercase, and from early Center English, its definite sense as "the globe" was expressed as the world. By Early Modern English, many nouns were capitalized, and the earth became (and often remained) the Earth, particularly if referenced together with other heavenly physiques. More recently, the name is sometimes simply given as Earth, by example with the names of the other planets. House styles now vary: Oxford spelling identifies the lowercase form as the utmost common, with the capitalized form an acceptable alternative. Another convention capitalizes "Earth" when appearing as a name (e. g. "Earth's atmosphere") but writes it in lowercase when preceded by the (e. g. "the atmosphere of the earth"). It almost always appears in lowercase in colloquial expressions such as "what on the planet are you doing? ".
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