hd wallpaper

Hundreds of striking hd wallpaper images for you to download today for free. PikWizard has combined some of the internet's best hd backgrounds to bring you some of the sharpest, crispest, and clearest backgrounds we could find. There is certainly something for everyone. Download now for your desktop, tablet, or mobile device, and enjoy looking at a fabulous high-resolution wallpaper every day!

00
Texture Pattern Wallpaper
00
Digital composite of Judge with balance scale in front of wallpaper
00
The night side of Earth twinkles with light, and the first thing to stand out is the cities. “Nothing tells us more about the spread of humans across the Earth than city lights,” asserts Chris Elvidge, a NOAA scientist who has studied them for 20 years.  This new global view and animation of Earth’s city lights is a composite assembled from data acquired by the Suomi National Polar-orbiting Partnership (Suomi NPP) satellite. The data was acquired over nine days in April 2012 and thirteen days in October 2012. It took satellite 312 orbits and 2.5 terabytes of data to get a clear shot of every parcel of Earth’s land surface and islands. This new data was then mapped over existing Blue Marble imagery of Earth to provide a realistic view of the planet.  The nighttime view in visible light was made possible by the new “day-night band” of Suomi NPP’s Visible Infrared Imaging Radiometer Suite. VIIRS detects light in a range of wavelengths from green to near-infrared and uses filtering techniques to observe dim signals such as city lights, auroras, wildfires, and reflected moonlight. This low-light sensor can distinguish night lights with ten to hundreds of times better light detection capability than scientists had before.  Named for satellite meteorology pioneer Verner Suomi, NPP flies over any given point on Earth&amp;rsquos surface twice each day at roughly 1:30 a.m. and 1:30 p.m. The polar-orbiting satellite flies 824 kilometers (512 miles) above the surface as it circles the planet 14 times a day. Data is sent once per orbit to a ground station in Svalbard, Norway, and continuously to local direct broadcast users around the world. The mission is managed by NASA with operational support from NOAA and its Joint Polar Satellite System, which manages the satellite's ground system.  NASA Earth Observatory image and animation by Robert Simmon, using Suomi NPP VIIRS data provided courtesy of Chris Elvidge (NOAA National Geophysical Data Center). Suomi NPP is the result of a partnership between NASA, NOAA, and the Department of Defense. Caption by Mike Carlowicz.  Instrument: Suomi NPP - VIIRS   Credit: <b><a href="http://www.earthobservatory.nasa.gov/" rel="nofollow"> NASA Earth Observatory</a></b>  <b>Click here to view all of the <a href="http://earthobservatory.nasa.gov/Features/NightLights/" rel="nofollow"> Earth at Night 2012 images </a></b>  <b>Click here to <a href="http://earthobservatory.nasa.gov/NaturalHazards/view.php?id=79803" rel="nofollow"> read more </a> about this image </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://instagram.com/nasagoddard?vm=grid" rel="nofollow">Instagram</a></b>
03
Digital composite of Young woman holding tablet PC with speech bubbles coming out from screen
00
composite of hand pointing at graphics
00
Smiling man adjusting his cufflings against sky blue background
04
Digital composite of Handshake of Business people against grey background
02
composite of hand holding questionmark graphic with blue background
00
composite of hand drawing business plan graphic
00
composite of Hands holding cup with goals graphics
00
Digital composite of summer is here vector
00
Wooden panels with striped pattern background, full frame
00
Portrait of businesswoman standing with arms crossed against grey background
00
Digitally generated image of player silhouette catching a ball
00
Digital composite image of silhouette athlete holding ruby ball against blue sky
00
Digital composite image of male chef standing with arms crossed against black background
00
Female executive standing with arms crossed against colored background
00
Smiling woman standing with arms crossed against sky blue background
00
Portrait of beautiful woman standing with arms crossed against blue background
00
Digital composite of Upset man sitting against grunge wall
00
Digital composite of Midsection of businesswoman holding smart phone against wall
00
Digital composite of Side view of displeased couple against blue background
01
Digital composite of Displeased couple against maroon background
00
Digital composite of Confident businesswoman gesturing over beige background
00
Digital composite of Digital composite image of business people with gears
02
Digital composite of Happy businessman gesturing over colored background
00
Old wood tree bark background, full frame
00
Digital composition of confident woman standing with arms crossed against turquoise background
00
Digital composition of kids with bagpacks standing against background back to school in text
02
Digital composite image of silhouette athlete holding rugby ball
02
composite of hand holding padlock graphic over blue background
00
Composite image of businessman holding digital tablet and pointing the screen with black background
00
Digital composite of characters holding poster
00
Serviceman standing with arms crossed against turquoise background
00
Digital composition of happy car mechanic holding wrench and drawn car shape in background
00
Digital composition of a confident male doctor standing against turquoise background
00
Mid-section of chef holding a perforated spoon against blue background
00
Portrait of man standing with his arms crossed against colorful background
00
Digital composite of Multiple image of frustrated businessman screaming through megaphone
00
Digital composite of Woman at computer with chart graphic overlay against blue background
00
Digital composite of Businesswoman using smart phone
00
Digital composite of Side view of businesswoman using tablet PC with blank screen

High-Resolution Wallpapers That Will Look Great on Any Screen

It doesn't matter what your wallpaper taste is, because there's really something for everyone here. From slick skylines and buildings to nature and animals, we're sure you're going to find something you can't wait to download. When you do, relax - all these wallpapers are free and don't need any attribution. You can even use them commercially, and no one will even care! So sit back and enjoy scrolling through these great pictures.

Popular Image Categories
Popular Video Categories