Earth at Night: Photos and Wallpapers Earth Blog
Rangking: 42
Size: 146.1KB
Width: 1920
Height: 1080
LOIRP Releases Recovered Lunar Orbiter V Image of u0026quot;Full Earthu0026quot; Moonviews
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 72
Earth is the 3 rd planet from sunlight and the only astronomical object known to harbor life. Based on radiometric dating and other sources of evidence, Planet 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. Earth revolves around the Sun in 365. 26 days, a period known as an Earth year. Throughout 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 Earth. The gravitational interaction between Earth and the Moon causes marine tides, stabilizes Earth's orientation on its axis, and progressively slows its rotator. Earth is the densest planet in the Photo voltaic System and the largest of the four terrestrial planets.
Earth's lithosphere is divided into several rigid tectonic plates that migrate across the surface over periods of many millions of years. About 71% of Earth's surface is covered with water, mainly by oceans. The remaining 29% is land consisting of areas and islands that collectively have many lakes, rivers and other sources of water that contribute to the hydrosphere. Nearly all Earth'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 internal core, a liquid outer core that generates the Earth's magnetic field, and a convecting mantle that drives plate tectonics.
Within just the first billion years of Earth's history, life appeared in the oceans and commenced to affect the Earth's atmosphere and surface, leading to the proliferation of aerobic and anaerobic organisms. Some geological evidence indicates that life could have arisen as much as 4. 1 billion years ago. Since then, the combination of Earth's distance from the Sunshine, physical properties, and geological history have allowed life to evolve and prosper. In the history of the Earth, biodiversity has long gone through long periods of expansion, occasionally punctuated by mass extinction events. Above 99% of species that ever lived on Earth are extinct. Estimates of the number of types in the world today vary broadly; most species have not been described. Over seven. 6 billion humans live on Earth and depend on its biosphere and natural resources for their success.[40] Humans have developed diverse societies and ethnicities; politically, the world has about 200 sovereign says.
The present day English word Earth developed from a large variety of Middle British forms, which derived from a classic English noun most often spelled eorðe. It has cognates in each Germanic language, and their proto-Germanic root has been reconstructed as *erþō. In its earliest appearances, eorðe was already being utilized to translate the many senses of Latin terra and Greek γῆ (gē): the floor, their soil, dry land, a persons 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 listed by Tacitus as among the devotees of Nerthus, and later Norse mythology included Jörð, a giantess often given since the mother of Thor.
Originally, world was written in lowercase, and from early Midsection English, its definite sense as "the globe" was expressed as the world. By Early Modern English, many nouns were made a fortune, and the earth became (and often remained) the Earth, particularly when referenced alongside 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 acknowledges 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 forwent by the (e. gary the gadget guy. "the atmosphere of the earth"). It almost always appears in lowercase in colloquial expressions such as "what in the world are you doing? ".
EarthNow Android Apps on Google Play
Full Earth, Closeup Digital Art by Nasa Earth Observatory/spl
10 Reasons We Shouldnu002639;t Leave Earth Yet Toptenz.net
