07 January 2014, 09:53 AM ET
This space wallpaper is a comparison of how big the moons of Mars appear to be, as seen from the surface of Mars, in relation to the size that Earth's moon appears to be when seen from the surface of Earth.
06 January 2014, 04:44 PM ET
This fascinating space wallpaper shows the caterpillar-shaped knot, called IRAS 20324+4057, which is a protostar in a very early evolutionary stage. It is still in the process of collecting material from an envelope of gas surrounding it.
03 January 2014, 09:18 AM ET
This wallpaper shows Badlands National Park in South Dakota, which contains the world’s richest Oligocene epoch fossil beds, dating 37-28 million years old. Ancient mammals such as the rhino, horse, and saber-toothed cat once roamed here.
02 January 2014, 09:34 AM ET
This space wallpaper shows part of a set of three images revealing views three seconds apart as the larger of Mars' two moons, Phobos, passed directly in front of the sun as seen by NASA's Mars rover Curiosity.
31 December 2013, 04:30 PM ET
This cool space wallpaper is an artist's concept showing the Wide-field Infrared Survey Explorer, or WISE spacecraft, in its orbit around Earth.
29 December 2013, 01:26 PM ET
This wallpaper shows Hawai‘i Volcanoes National Park. The park displays the results of 70 million years of volcanism, migration, and evolution and a distinct human culture.
27 December 2013, 04:15 PM ET
The spectacular swirling arms and central bar of the Sculptor galaxy are revealed in this space wallpaper from NASA's Spitzer Space Telescope.
23 December 2013, 02:25 PM ET
This space wallpaper of Herbig-Haro object HH 46/47 combines radio observations acquired with ALMA with much shorter wavelength visible light observations from ESO’s New Technology Telescope.
20 December 2013, 01:40 PM ET
From more than 40 countries and 30 U.S. states, people around the world shared more than 1,400 images of themselves as part of the Wave at Saturn event organized by NASA's Cassini mission as seen in this cool space wallpaper.
19 December 2013, 04:18 PM ET
The northwestern part of Greece is pictured in this space wallpaper by the Landsat-8 satellite. The Ionian Sea dominates the left side of the image, with the Ambracian Gulf near the center.
18 December 2013, 09:53 AM ET
A piercingly bright curtain of stars is the backdrop for this beautiful space wallpaper taken by astronomer Håkon Dahle.
17 December 2013, 10:54 AM ET
This wallpaper shows Everglades National Park in Florida. It is the largest subtropical wilderness in the United States and boasts rare and endangered species.
16 December 2013, 08:59 AM ET
This space wallpaper is a color-coded topography map from NASA's Dawn mission, which shows the giant asteroid Vesta.
13 December 2013, 01:47 PM ET
This wallpaper shows Gulf Islands National Seashore of Florida and Mississippi. Stunning beaches, historic ruins, wildlife sanctuaries and remote islands make up this wonderful park.
12 December 2013, 10:35 AM ET
This beautiful space wallpaper portrays the galaxies NGC 799 (below) and NGC 800 (above) located in the constellation of Cetus (The Whale).
11 December 2013, 11:29 AM ET
Mysteries of Sonoran Desert life are slowly revealed and abundantly displayed at Organ Pipe Cactus National Monument in Arizona as seen in this wallpaper.
10 December 2013, 04:39 PM ET
How many rings do you see in this cool space wallpaper of the galaxy Messier 94, also known as NGC 4736? While at first glance one might see a number of them, astronomers believe there is just one.
09 December 2013, 04:05 PM ET
This space wallpaper of the sun was taken on Aug. 14, 2013 from the premises of European Space Operations Centre in Darmstadt, Germany.
06 December 2013, 10:30 AM ET
This beautiful space wallpaper shows the view to the east from Paranal Observatory, seconds after the sun has disappeared behind the horizon.
05 December 2013, 12:26 PM ET
This wallpaper shows Lassen Volcanic National Park in California. The park is home to smoking fumaroles, meadows freckled with wildflowers, clear mountain lakes, and numerous volcanoes.
04 December 2013, 08:57 AM ET
Astronomers using NASA's Hubble Space Telescope have solved a 40-year mystery on the origin of the Magellanic Stream, a long ribbon of gas stretching nearly halfway around our Milky Way galaxy, as seen in this space wallpaper.
03 December 2013, 10:55 AM ET
ESA astronaut Luca Parmitano took this photo of the Mediterranean and the Pleiades as seen from the International Space Station in this cool space wallpaper. "The Mediterranean, the Pleiades and a storm in the distance," he Tweeted on July 29, 2013.
02 December 2013, 09:38 AM ET
This beautiful wallpaper is an archive image of Lake Clark National Park and Preserve in Alaska.
29 November 2013, 02:02 PM ET
This time-lapse space wallpaper shows Comet ISON approaching and leaving during its slingshot around the sun — represented by the white circle — on Nov. 28, 2013. The ISON images clearly outline the curve of the comet's orbit path.
27 November 2013, 11:11 AM ET
This stunning space wallpaper shows the ancient cratered southern highlands of Mars. Faint traces of a wet past are seen in the form of channels (lower center), fluidized debris around craters (bottom right) and blocks of eroded sediments (top left).
25 November 2013, 08:58 AM ET
This space wallpaper reveals a detailed view of a star-forming region in the Large Magellanic Cloud — one of the Milky Way's satellite galaxies.
22 November 2013, 03:03 PM ET
This beautiful wallpaper shows Great Sand Dunes National Park and Preserve in Colorado. Alpine tundra, forests, massive dunes, grasslands, and wetlands are all protected as elements of the Great Sand Dunes natural system.
21 November 2013, 02:05 PM ET
This cool space wallpaper reveals a very young star being born in the guts of the dark cloud LDN 43 — a massive blob of gas, dust, and ices, gathered 520 light-years from Earth in the constellation of Ophiuchus (The Serpent Bearer).
20 November 2013, 11:25 AM ET
Glowing a dark magenta, the newly discovered exoplanet GJ 504b, as seen in this space wallpaper, weighs in with about four times Jupiter's mass, making it the lowest-mass planet ever directly imaged around a star like the sun.
19 November 2013, 12:12 PM ET
This beautiful wallpaper shows Isle Royale National Park in Michigan. Isle Royale’s physical isolation and primitive wilderness challenged human use for centuries; ironically today it has become the Island’s main attraction.
18 November 2013, 10:06 AM ET
This beautiful space wallpaper shows spiral galaxy Messier 100, located in the southern part of the constellation of Coma Berenices, and lying about 55 million light-years from Earth.
15 November 2013, 11:34 AM ET
This stunning space wallpaper shows the view of the sun from the SWAP (Sun Watcher using Active Pixel System detector and Image Processing) instrument onboard ESA's Proba-2 satellite.