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"Browse the best collection of background images and wallpapers on the Internet, available free in the PikWizard gallery. Inside our collection of HD background images, pictures and wallpapers, you’ll find the background image that best suits your needs - different patterns, sizes, colors, and textures available! We’ve brought together this huge variety of premium-quality backgrounds and HD wallpapers for Desktop, Android, and iPhone so you can effortlessly find the one background image you really love and use it in your next commercial or non-commercial project. Best of all, they’re all completely free for you. No attribution required. "

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Clouds violet plane airplane
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Wool Texture Fabric
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Leaf Drop Tree
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Plane Fling on Sky Leaving Contrailss
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Jellyfish Invertebrate Animal
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Close Up Photography Green Grass during Daytime
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Back light beautiful flowers blue gray
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Autumn beautiful beauty bloom
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Purple flowers on field
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Background Fruits
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Away background background image clouds
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Autumn background background image copy space
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Background image bird black black background
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the image of buddha in thailand
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New background
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Cobble stone road background, full frame
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Bread free image image nature
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NASA acquired November 24, 2011  From its vantage 824 kilometers (512 miles) above Earth, the Visible Infrared Imager Radiometer Suite (VIIRS) on the NPOESS Preparatory Project (NPP) satellite gets a complete view of our planet every day. This image from November 24, 2011, is the first complete global image from VIIRS.  The NPP satellite launched on October 28, 2011, and VIIRS acquired its first measurements on November 21. To date, the images are preliminary, used to gauge the health of the sensor as engineers continue to power it up for full operation.  Rising from the south and setting in the north on the daylight side of Earth, VIIRS images the surface in long wedges measuring 3,000 kilometers (1,900 miles) across. The swaths from each successive orbit overlap one another, so that at the end of the day, the sensor has a complete view of the globe. The Arctic is missing because it is too dark to view in visible light during the winter.  The NPP satellite was placed in a Sun-synchronous orbit, a unique path that takes the satellite over the equator at the same local (ground) time in every orbit. So, when NPP flies over Kenya, it is about 1:30 p.m. on the ground. When NPP reaches Gabon—about 3,000 kilometers to the west—on the next orbit, it is close to 1:30 p.m. on the ground. This orbit allows the satellite to maintain the same angle between the Earth and the Sun so that all images have similar lighting.  The consistent lighting is evident in the daily global image. Stripes of sunlight (sunglint) reflect off the ocean in the same place on the left side of every swath. The consistent angle is important because it allows scientists to compare images from year to year without worrying about extreme changes in shadows and lighting.  The image also shows a band of haze along the right side of every orbit swath. When light travels through the atmosphere, it bounces off particles or scatters, making the atmosphere look hazy. The scattering effect is most pronounced along the edge of the swath, where the sensor is looking at an angle through more of the atmosphere. Scientists can correct for this scattering effect, but need measurements from a range of wavelengths to do so. The degree to which light scatters depends partly on the wavelength of the light. Blue light scatters more than red light, for example, which is why the sky is blue. VIIRS measures 22 different wavelengths of light, but not all of the sensor’s detectors are operating at peak performance yet. Those measuring thermal infrared light are not yet cold enough to collect reliable measurements.  Once VIIRS begins full operations, it will produce a range of measurements from ocean temperature to clouds to the locations of fires. These measurements will help extend the record from earlier sensors like the Moderate Resolution Imaging Spectroradiometer (MODIS). VIIRS is very similar to MODIS, but flies at a higher altitude to measure the whole planet without gaps. (MODIS daily measurements have gaps at the equator. See the MODIS image from November 24.) VIIRS also sees the Earth in less detail, 375 meters per pixel, compared to 250 meters per pixel for MODIS.  Image by NASA’s NPP Land Product Evaluation and Testing Element. Caption by Holli Riebeek.  Credit: <b><a href="http://www.earthobservatory.nasa.gov/" rel="nofollow"> NASA Earth Observatory</a></b>  <b><a href="http://www.nasa.gov/audience/formedia/features/MP_Photo_Guidelines.html" rel="nofollow">NASA image use policy.</a></b>  <b><a href="http://www.nasa.gov/centers/goddard/home/index.html" rel="nofollow">NASA Goddard Space Flight Center</a></b> enables NASA’s mission through four scientific endeavors: Earth Science, Heliophysics, Solar System Exploration, and Astrophysics. Goddard plays a leading role in NASA’s accomplishments by contributing compelling scientific knowledge to advance the Agency’s mission.  <b>Follow us on <a href="http://twitter.com/NASA_GoddardPix" rel="nofollow">Twitter</a></b>  <b>Like us on <a href="http://www.facebook.com/pages/Greenbelt-MD/NASA-Goddard/395013845897?ref=tsd" rel="nofollow">Facebook</a></b>  <b>Find us on <a href="http://instagrid.me/nasagoddard/?vm=grid" rel="nofollow">Instagram</a></b>
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City Image
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Image painting
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This image, captured Feb. 1, 2014, shows a colorized view of Earth from the moon-based perspective of NASA's Lunar Reconnaissance Orbiter.  Credit: NASA/Goddard/Arizona State University  --  NASA's Lunar Reconnaissance Orbiter (LRO) experiences 12 &quot;earthrises&quot; every day, however LROC (short for LRO Camera)  is almost always busy imaging the lunar surface so only rarely does an opportunity arise such that LROC can capture a view of Earth. On Feb. 1, 2014, LRO pitched forward while approaching the moon's north pole allowing the LROC Wide Angle Camera to capture Earth rising above Rozhdestvenskiy crater (112 miles, or 180 km, in diameter).  Read more: <a href="http://go.nasa.gov/1oqMlgu" rel="nofollow">go.nasa.gov/1oqMlgu</a>  <b><a href="http://www.nasa.gov/audience/formedia/features/MP_Photo_Guidelines.html" rel="nofollow">NASA image use policy.</a></b>  <b><a href="http://www.nasa.gov/centers/goddard/home/index.html" rel="nofollow">NASA Goddard Space Flight Center</a></b> enables NASA’s mission through four scientific endeavors: Earth Science, Heliophysics, Solar System Exploration, and Astrophysics. Goddard plays a leading role in NASA’s accomplishments by contributing compelling scientific knowledge to advance the Agency’s mission.  <b>Follow us on <a href="http://twitter.com/NASAGoddardPix" rel="nofollow">Twitter</a></b>  <b>Like us on <a href="http://www.facebook.com/pages/Greenbelt-MD/NASA-Goddard/395013845897?ref=tsd" rel="nofollow">Facebook</a></b>  <b>Find us on <a href="http://instagram.com/nasagoddard?vm=grid" rel="nofollow">Instagram</a></b>
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Background blurred background
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This view of pale blue-green Uranus was recorded by NASA's Voyager 2 on Jan 25, 1986, as the spacecraft left the planet behind. The thin crescent of Uranus is seen here between the spacecraft, the planet and the Sun.  http://photojournal.jpl.nasa.gov/catalog/PIA00143
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Green image needles painting
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NASA Dawn spacecraft spotted this pair of craters on Ceres on January 25, 2016. The crater at left is named Jaja, after the Abkhazian harvest goddess. Jaja Crater is 13 miles 21 kilometers in diameter and is located in the northern hemisphere.
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Abstract image of trees
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This image, taken by NASA's Dawn spacecraft, shows the surface of dwarf planet Ceres from an altitude of 915 miles (1,470 kilometers). The image, with a resolution of 450 feet (140 meters) per pixel, was taken on August 25, 2015.  http://photojournal.jpl.nasa.gov/catalog/PIA19895
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Beautiful fog image lake
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Broccoli bud closeup color image
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Allgau alpine autumn calendar image
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Tilt Image of Electric Fan
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Alpine blue calendar image clouds
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This image, taken by NASA's Dawn spacecraft, shows a portion of the southern hemisphere of dwarf planet Ceres from an altitude of 2,700 miles (4,400 kilometers). The image, with a resolution of 1,400 feet (410 meters) per pixel, was taken on June 25, 2015.  The image was obtained on June 25, 2015 from an altitude of 2,700 miles (4,400 kilometers) above Ceres and has a resolution of 1,400 feet (410 meters) per pixel.   http://photojournal.jpl.nasa.gov/catalog/PIA19616
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This image, taken by NASA's Dawn spacecraft, shows high southern latitudes on Ceres from an altitude of 2,700 miles (4,400 kilometers). The image, with a resolution of 1,400 feet (410 meters) per pixel, was taken on June 25, 2015. Zadeni crater, measuring about 80 miles (130 kilometers) across, is on the right side of the image.   http://photojournal.jpl.nasa.gov/catalog/PIA19634
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This image, taken by NASA's Dawn spacecraft, shows a portion of the southern hemisphere of dwarf planet Ceres from an altitude of 2,700 miles (4,400 kilometers). The image, with a resolution of 1,400 feet (410 meters) per pixel, was taken on June 25, 2015.   http://photojournal.jpl.nasa.gov/catalog/PIA19612
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Africa animal elephant free image
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Image of a Floating Bubble
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Textile Background
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Autumn fall fall background fall leaves background
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Autumn fall fall background fall leaves background
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Close-up green leaves, background
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NASA image release May 11, 2010  Hubble Catches Heavyweight Runaway Star Speeding from 30 Doradus  Image: ESO 2.2-m WFI Image of the Tarantula Nebula  A blue-hot star, 90 times more massive than our Sun, is hurtling across space fast enough to make a round trip from Earth to the Moon in merely two hours. Though the speed is not a record-breaker, it is unique to find a homeless star that has traveled so far from its nest. The only way the star could have been ejected from the star cluster where it was born is through a tussle with a rogue star that entered the binary system where the star lived, which ejected the star through a dynamical game of stellar pinball. This is strong circumstantial evidence for stars as massive as 150 times our Sun's mass living in the cluster. Only a very massive star would have the gravitational energy to eject something weighing 90 solar masses. The runaway star is on the outskirts of the 30 Doradus nebula, a raucous stellar breeding ground in the nearby Large Magellanic Cloud. The finding bolsters evidence that the most massive stars in the local universe reside in 30 Doradus, making it a unique laboratory for studying heavyweight stars. 30 Doradus, also called the Tarantula Nebula, is roughly 170,000 light-years from Earth.  To learn more about this image go to: <a href="http://www.nasa.gov/mission_pages/hubble/science/runaway-star.html" rel="nofollow">www.nasa.gov/mission_pages/hubble/science/runaway-star.html</a>  Credit: NASA/ESO, J. Alves (Calar Alto, Spain), and B. Vandame and Y. Beletski (ESO)  <b><a href="http://www.nasa.gov/centers/goddard/home/index.html" rel="nofollow">NASA Goddard Space Flight Center</a></b>  is home to the nation's largest organization of combined scientists, engineers and technologists that build spacecraft, instruments and new technology to study the Earth, the sun, our solar system, and the universe.
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January 25, 2012  <b>*Updated February 2, 2012: According to Flickr, &quot;The western hemisphere Blue Marble 2012 image has rocketed up to over 3.1 million views making it one of the all time most viewed images on the site after only one week.&quot;</b>  A 'Blue Marble' image of the Earth taken from the VIIRS instrument aboard NASA's most recently launched Earth-observing satellite - Suomi NPP. This composite image uses a number of swaths of the Earth's surface taken on January 4, 2012. The NPP satellite was renamed 'Suomi NPP' on January 24, 2012 to honor the late Verner E. Suomi of the University of Wisconsin.   Suomi NPP is NASA's next Earth-observing research satellite. It is the first of a new generation of satellites that will observe many facets of our changing Earth.  Suomi NPP is carrying five instruments on board. The biggest and most important instrument is The Visible/Infrared Imager Radiometer Suite or VIIRS.   To read more about NASA's Suomi NPP go to: <a href="http://www.nasa.gov/npp" rel="nofollow">www.nasa.gov/npp</a>  Credit: NASA/NOAA/GSFC/Suomi NPP/VIIRS/Norman Kuring  <b><a href="http://www.nasa.gov/audience/formedia/features/MP_Photo_Guidelines.html" rel="nofollow">NASA image use policy.</a></b>  <b><a href="http://www.nasa.gov/centers/goddard/home/index.html" rel="nofollow">NASA Goddard Space Flight Center</a></b> enables NASA’s mission through four scientific endeavors: Earth Science, Heliophysics, Solar System Exploration, and Astrophysics. Goddard plays a leading role in NASA’s accomplishments by contributing compelling scientific knowledge to advance the Agency’s mission.  <b>Follow us on <a href="http://twitter.com/NASAGoddardPix" rel="nofollow">Twitter</a></b>  <b>Like us on <a href="http://www.facebook.com/pages/Greenbelt-MD/NASA-Goddard/395013845897?ref=tsd" rel="nofollow">Facebook</a></b>  <b>Find us on <a href="http://instagrid.me/nasagoddard/?vm=grid" rel="nofollow">Instagram</a></b>
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View of beautiful green forest, background
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Close-up of green plants, background
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View of bridge over lake, background
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Reflection of trees and bridge in lake, background

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