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Clean Earth Versus Polluted Earth Photograph by Yali Shi
Earth Astronomical symbol of WorldThe Blue Marble, the first full-view photograph of the planet, was captured by astronauts en route to the Moon in 1972
Earth is the third planet from the Sun and the only astronomical thing known to harbor life. According to radiometric dating and some other sources of evidence, Planet formed over 4. 5 billion years ago. Globe's gravity treats other things in space, especially the Sun and the Celestial satellite, Earth's only natural satellite tv. Earth revolves around the Sun in 365. 26 days, a period known as an Earth year. Throughout this time, Earth revolves about its axis about 366. 26 times.
Globe's axis of rotation is tilted with respect to its orbital plane, producing seasons on Earth. The gravitational interaction between Earth and the Moon causes sea tides, stabilizes Earth's positioning on its axis, and progressively slows its turn. Earth is the densest planet in the Solar System and the greatest of the four terrestrial planets.
Earth's lithosphere is divided into several inflexible tectonic plates that move across the surface over periods of many thousands of years. About 71% of Earth's surface is covered with water, generally by oceans. The 29% is land including continents and islands that collectively have many lakes, streams and other sources of water that contribute to the hydrosphere. Nearly all Globe's polar regions are covered in ice, like the Antarctic ice sheet and the sea ice of the Arctic ice pack. Earth's interior remains active with a solid iron internal core, a liquid outer core that generates the Earth's magnetic field, and a convecting mantle that drives plate tectonics.
Within the first billion years of Earth's history, life appeared in the oceans and commenced 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 years ago. Since then, the mixture of Earth's distance from the Sun, 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. More than 99% of all species that ever lived on Earth are extinct. Estimates of the number of varieties in the world today vary broadly; most species have not been described. Over 7. 6 billion humans live on Earth and count on its biosphere and natural resources for their survival.[40] Humans are suffering from diverse societies and civilizations; politically, the world has about 200 sovereign states.
The current English word World developed from a large variety of Middle English forms, which derived from a vintage English noun most often spelled eorðe. That has cognates in most Germanic language, and their proto-Germanic root has been reconstructed as *erþō. In the earliest appearances, eorðe was already being utilized to convert the many senses of Latin terra and Ancient greek γῆ (gē): the floor, their soil, dry land, the human world, the surface of the world (including the sea), and the globe 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 mother of Thor.
Originally, earth was written in lowercase, and from early Center English, its definite sense as "the globe" was expressed as the planet. By Early Modern English, many nouns were made a fortune, 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 analogy with the names of the other planets. House styles now vary: Oxford spelling recognizes the lowercase form as the utmost common, with the made a fortune 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. h. "the atmosphere of the earth"). It almost always appears in lowercase in colloquial expressions such as "what on earth are you doing? ".
Sermons u2013 Franklin Community Church
Full Earth Showing The Americas Photograph by Stocktrek Images
Cassini latest u2013 NASA releases stunning view of Earthu2026 all the way from Saturn Science News
