Planet Earth Wallpaper 1920x1080 84 images
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Spinning planet Earth isolated black bg textures by NASA Motion Background Storyblocks Video
World Astronomical symbol of WorldThe Blue Marble, the first full-view photograph of the planet, was captured by astronauts en route to the Moon in 72
Earth is the 3rd planet from the sunlight and the only astronomical object known to harbor life. According to radiometric dating and other sources of evidence, World formed over 4. 5 billion years ago. Earth's gravity treats other things in space, especially the Sun and the Celestial satellite, Earth's only natural satellite. Earth revolves around the Sun in 365. 26 days and nights, a period known as an Earth year. During this time, Earth moves 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 inflexible tectonic plates that migrate across the surface over periods of many thousands of years. About 71% of Earth's surface is covered with water, mostly by oceans. The 29% is land consisting of regions and islands that collectively have many lakes, rivers and other sources of water that contribute to the hydrosphere. Virtually all Globe's polar regions are covered in ice, such as the Antarctic ice sheet and the sea ice of the Arctic ice pack. Earth's interior remains active with a solid iron inner core, a liquid exterior 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 oceans and started to influence the Earth's atmosphere and surface, leading to the proliferation of aerobic and anaerobic organisms. Some geological evidence indicates that life may have arisen as much as 4. 1 billion dollars years ago. Since then, the mixture of Globe's distance from the Sunlight, physical properties, and geological history have allowed life to evolve and flourish. In the history of the Earth, biodiversity has long gone through long periods of expansion, occasionally punctuated by mass extinction events. Over 99% of all species that ever lived on Planet are extinct. Estimates of the number of varieties in the world today vary widely; most species have not been described. Over several. 6 billion humans live on Earth and count on its biosphere and natural resources for their survival.[40] Humans allow us diverse societies and cultures; politically, the world has about 200 sovereign states.
The current English word Planet developed from a large variety of Middle English forms, which derived from a classic English noun most often spelled eorðe. That has cognates in every Germanic language, and their proto-Germanic root has been reconstructed as *erþō. In their earliest appearances, eorðe was already used to translate the many senses of Latin terra and Ancient greek γῆ (gē): the floor, its soil, dry land, a persons 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 since the mom of Thor.
Originally, earth was written in lowercase, and from early Midsection English, its definite sense as "the globe" was expressed as the world. By Early Modern The english language, 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 recognizes the lowercase form as the utmost common, with the capitalized form an acceptable version. Another convention capitalizes "Earth" when appearing as a name (e. g. "Earth's atmosphere") but writes it in lowercase when forwent by the (e. g. "the atmosphere of the earth"). It almost always appears in lowercase in colloquial expressions such as "what in the world are you doing? ".
Earth Revolving Search Results Calendar 2015
Earth images
One Earth Filter Being Design
