Planeet aarde behang voor chroom is de nieuwste planeet aarde wallpapers van ruimte, natuur, nationale geografische, landschap en…
For all the planet earth nature space awesome fans out there ♥♥, install this must have themes for you chrome and chromebook, with beautiful nature close-ups, sun rays, water falls, view from space and more...
Chromebooks and chrome optimized themes for all screen resolutions (1920x1080, 1366x768 and more).
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- Select your favorite wallpaper from many available planet earth nature space wallpapers. Shuffle all planet earth nature space pictures (randomized background images) or select your favorite planet earth nature space picture.
- Choose pictures of your favorite styles like forest fog evening
- Check Date & Time instantly with a digital clock in Chrome new tab themes.
- Highest Quality - All themes are HD or 4K quality from the best artists in the fan art community.
- Cool Addons - Time, Weather, Search Box, Must have links to Facebook, Youtube, Gmail, Instagram, Twitter, SnapChat, Tumbler etc...
- Added "Uninstall Button" to help out with uninstall if needed.
- Added more wallpaper by users requests.
- Improved theme performance on Chromebooks.
- More links in the link box.
ABOUT planet earth nature space
Earth is the third planet from the Sun and the only object in the Universe known to harbor life. According to radiometric dating and other sources of evidence, Earth formed over 4 billion years ago. Earth's gravity interacts with other objects in space, especially the Sun and the Moon, Earth's only natural satellite. During one orbit around the Sun, Earth rotates about its axis about 365.26 times; thus, an Earth year is about 365.26 days long.[n 5]
Earth's axis of rotation is tilted, producing seasonal variations on the planet's surface. The gravitational interaction between the Earth and Moon causes ocean tides, stabilizes the Earth's orientation on its axis, and gradually slows its rotation. Earth is the densest planet in the Solar 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, mostly by its oceans. The remaining 29% is land consisting of continents and islands that together have many lakes, rivers and other sources of water that contribute to the hydrosphere. The majority of Earth's polar regions are covered in ice, including 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 outer core that generates the Earth's magnetic field, and a convecting mantle that drives plate tectonics. Zermatt xperia z xperia wolf winter windows 8 windows 7 windows 10 widescreen water vintage vertical underwater ultra hd turtle trippy triple monitor trees toblerone tilt shift tiger Switzerland Swiss Alps surreal sunset sunrise sun-rays sunlight sun rays sun and moon sun stones stars starry night star Spain space wallpaper space hd space art space sony snowy peak snow smartphone sky simple background simple sea sci-fi scenery samsung galaxy sad rocks rock-formation rock road river retina display reflection red leaves rainbow qhd purple psychedelic post apocalyptic planetscape planet earth planet pink photography panoramic painting overcast outer space orange on fire night light night nepal neon nature national geographic nasa mount-fuji mountains mountain-pass mountain morning Moon mist minimalistic minecraft milky-way Milky Way matterhorn mass effect maple leaves manipulation macbook pro long-exposure logo lock screen live Link lights light lenovo leaves laptop landscape lake japan isolation island islam iphone original iphone 6s plus iphone 6 iphone 5 iphone 4s iphone 3g ipad mini ipad air ios 9 ios 8 ios 7 ios 6 ios 5 ios 4 ios indonesia imac illustration humor horizon hologram hipster-photography himalayas hills high resolution high re high definition high def hi res height heart hd 1080p halo green gray grass graphic golden gold go green glasses galaxy s6 galaxy s5 galaxy s3 galaxy futuristic funny full hd fuckscape from-space forest fog foam fir-trees fire and ice fall eye explosion evening europe epic elements eclipse earth dual screen dual monitor divinity disc-jockey disaster digital-art digital art deviantart destroyed destiny desktop depth-of-field depth of field demotivational decline death star darkness dark cyber cute curve creative corsica composite colorful color-correction cold coast clouds cloud christmas cartoon calm british-columbia bokeh boat blurred blue marble blue black and white bing binary bends beautiful beach balance background awesome avatar the last airbender australia august atmosphere astronaut asia artwork artistic april apple iphone apocalypse antarctica annapurna animated android alps ali-ibn-abi-talib ajaccio africa aerial-view aerial view abstract 4k resolution 3d hd 3d 1440p 2014. Within the first billion years of Earth's history, life appeared in the oceans and began to affect 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 years ago. Since then, the combination of Earth's distance from the Sun, physical properties, and geological history have allowed life to evolve and thrive. In the history of the Earth, biodiversity has gone through long periods of expansion, occasionally punctuated by mass extinction events. Over 99% of all species that ever lived on Earth are extinct. Estimates of the number of species on Earth today vary widely; most species have not been described. Over 7.4 billion humans live on Earth and depend on its biosphere and natural resources for their survival. Humans have developed diverse societies and cultures; politically, the world has about 200 sovereign states.
Name and etymology
The modern English word Earth developed from a wide variety of Middle English forms,[n 6] which derived from an Old English noun most often spelled eorðe. It has cognates in every 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 ground,[n 7] its soil,[n 8] dry land,[n 9] the human world,[n 10] the surface of the world (including the sea),[n 11] and the globe itself.[n 12] 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 as the mother of Thor.
Originally, earth was written in lowercase, and from early Middle English, its definite sense as "the globe" was expressed as the earth. By early Modern English, many nouns were capitalized, and the earth became (and often remained) the Earth, particularly when referenced along with other heavenly bodies. 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 most common, with the capitalized form an acceptable variant. 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 earth are you doing?"
Main article: History of Earth
Artist's impression of the early Solar System's planetary disk
The oldest material found in the Solar System is dated to 4.5672±0.0006 billion years ago (Gya). By 4.54±0.04 Gya the primordial Earth had formed. The formation and evolution of Solar System bodies occurred along with the Sun. In theory, a solar nebula partitions a volume out of a molecular cloud by gravitational collapse, which begins to spin and flatten into a circumstellar disk, and then the planets grow out of that disk along with the Sun. A nebula contains gas, ice grains, and dust (including primordial nuclides). According to nebular theory, planetesimals formed by accretion, with the primordial Earth taking 10–20 million years (Ma) to form.
A subject of on-going research is the formation of the Moon, some 4.53 billion years ago. A working hypothesis is that it was formed by accretion from material loosed from Earth after a Mars-sized object, named Theia, impacted Earth. In this scenario, the mass of Theia was approximately 10% of that of Earth, it impacted Earth with a glancing blow, and some of its mass merged with Earth. Between approximately 4.1 and 3.8 Gya, numerous asteroid impacts during the Late Heavy Bombardment caused significant changes to the greater surface environment of the Moon, and by inference, to that of Earth.
Main article: Geological history of Earth
Hoodoos at the Bryce Canyon National Park, Utah
Earth's atmosphere and oceans were formed by volcanic activity and outgassing that included water vapor. The origin of the world's oceans was condensation augmented by water and ice delivered by asteroids, protoplanets, and comets. In this model, atmospheric "greenhouse gases" kept the oceans from freezing when the newly forming Sun had only 70% of its current luminosity. By 3.5 Gya, Earth's magnetic field was established, which helped prevent the atmosphere from being stripped away by the solar wind.
A crust formed when the molten outer layer of Earth cooled to form a solid. The two models that explain land mass propose either a steady growth to the present-day forms or, more likely, a rapid growth early in Earth history followed by a long-term steady continental area. Continents formed by plate tectonics, a process ultimately driven by the continuous loss of heat from Earth's interior. On time scales lasting hundreds of millions of years, the supercontinents have assembled and broken apart. Roughly 750 Mya (million years ago), one of the earliest known supercontinents, Rodinia, began to break apart. The continents later recombined to form Pannotia, 600–540 Mya, then finally Pangaea, which also broke apart 180 Mya.
The present pattern of ice ages began about 40 Mya and then intensified during the Pleistocene about 3 Mya. High-latitude regions have since undergone repeated cycles of glaciation and thaw, repeating about every 40,000–100000 years. The last continental glaciation ended 10,000 years ago.
Orange labels: known ice ages.
Also see: Human timeline and Nature timeline
Main articles: Abiogenesis and Evolutionary history of life
Speculative phylogenetic tree of life on Earth based on rRNA analysis
Chemical reactions led to the first self-replicating molecules about four billion years ago. A half billion years later, the last common ancestor of all life arose. The evolution of photosynthesis allowed the Sun's energy to be harvested directly by life forms. The resultant molecular oxygen (O2) accumulated in the atmosphere and due to interaction with ultraviolet solar radiation, formed a protective ozone layer (O3) in the upper atmosphere. The incorporation of smaller cells within larger ones resulted in the development of complex cells called eukaryotes. True multicellular organisms formed as cells within colonies became increasingly specialized. Aided by the absorption of harmful ultraviolet radiation by the ozone layer, life colonized Earth's surface. Among the earliest fossil evidence for life is microbial mat fossils found in 3.48 billion-year-old sandstone in Western Australia, biogenic graphite found in 3.7 billion-year-old metasedimentary rocks in Western Greenland, remains of biotic material found in 4.1 billion-year-old rocks in Western Australia.
During the Neoproterozoic, 750 to 580 Mya, much of Earth might have been covered in ice. This hypothesis has been termed "Snowball Earth", and it is of particular interest because it preceded the Cambrian explosion, when multicellular life forms significantly increased in complexity. Following the Cambrian explosion, 535 Mya, there have been five major mass extinctions. The most recent such event was 66 Mya, when an asteroid impact triggered the extinction of the non-avian dinosaurs and other large reptiles, but spared some small animals such as mammals, which then resembled shrews. Over the past 66 Ma, mammalian life has diversified, and several million years ago an African ape-like animal such as Orrorin tugenensis gained the ability to stand upright. This facilitated tool use and encouraged communication that provided the nutrition and stimulation needed for a larger brain, which allowed the evolution of humans. The development of agriculture, and then civilization, led to humans having an influence on Earth and the nature and quantity of other life forms that continues today.
Main article: Future of Earth
See also: Global catastrophic risk
Earth's expected long-term future is closely tied to that of the Sun. Over the next 1.1 Ga, solar luminosity will increase by 10%, and over the next 3.5 Ga by 40%. The Earth's increasing surface temperature will accelerate the inorganic CO2 cycle, reducing its concentration to levels lethally low for plants (10 ppm for C4 photosynthesis) in approximately 500–900 Ma. The lack of vegetation will result in the loss of oxygen in the atmosphere, and animal life will become extinct. After another billion years all surface water will have disappeared and the mean global temperature will reach 70 °C (158 °F). From that point, the Earth is expected to be habitable for another 500 Ma, possibly up to 2.3 Ga if nitrogen is removed from the atmosphere. Even if the Sun were eternal and stable, 27% of the water in the modern oceans will descend to the mantle in one billion years, due to reduced steam venting from mid-ocean ridges.
The Sun will evolve to become a red giant in about 5 Ga. Models predict that the Sun will expand to roughly 1 AU (150,000,000 km), which is about 250 times its present radius. Earth's fate is less clear. As a red giant, the Sun will lose roughly 30% of its mass, so, without tidal effects, Earth will move to an orbit 1.7 AU from the Sun when the star reaches its maximum radius. Most, if not all, remaining life will be destroyed by the Sun's increased luminosity (peaking at about 5,000 times its present level). A 2008 simulation indicates that Earth's orbit will eventually decay due to tidal effects and drag, causing it to enter the Sun's atmosphere and be vaporized.
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