25 February 2014, 12:25 PM ET
Roguish runaway stars can have a big impact on their surroundings as they plunge through the Milky Way galaxy. Their high-speed encounters shock the galaxy, creating arcs, as seen in this space wallpaper of speedster star Kappa Cassiopeiae, or HD 2905.
24 February 2014, 03:46 PM ET
This space wallpaper shows a model of the interstellar magnetic fields — which would otherwise be straight — warping around the outside of our heliosphere. The image is based on data from NASA's Interstellar Boundary Explorer.
21 February 2014, 10:14 AM ET
This fascinating Chandra X-Ray Observatory space wallpaper of the young star cluster NGC 346 highlights a heart-shaped cloud of 8 million-degree Celsius gas in the central region.
19 February 2014, 03:07 PM ET
This stunning space wallpaper is the first map of radioactivity in a supernova remnant, the blown-out bits and pieces of a massive star that exploded.
19 February 2014, 11:44 AM ET
In this space wallpaper of a dune field on Mars in a large crater near Mawrth Vallis, some of the dunes appear to be in a V-shaped formation. For dune fields, the spacing of individual dunes is a function of sand supply, wind speed, and topography.
14 February 2014, 10:12 AM ET
NASA's Cold Atom Laboratory utilizes a magnetic trap that confines particles, allowing them to cool to temperatures just barely above absolute zero as seen in this space wallpaper.
13 February 2014, 01:07 PM ET
This space wallpaper shows Jupiter's moon Ganymede centered at 200 west longitude. This mosaic (right) served as the base map for the geologic map of Ganymede (left).
12 February 2014, 01:22 PM ET
This stunning space wallpaper is a composite of 25 separate images spanning the period of Feb. 11, 2013 to Feb. 11, 2014.
11 February 2014, 09:27 AM ET
This space wallpaper combines a photograph of seasonal dark flows on a Martian slope with a grid of colors based on data collected by a mineral-mapping spectrometer observing the same area. Image released Feb. 10, 2014.
10 February 2014, 01:42 PM ET
This vivid space wallpaper shows a region of the planet’s northern hemisphere known as Hephaestus Fossae – after the Greek god of fire – that was imaged by the high-resolution stereo camera on ESA’s Mars Express orbiter on Dec. 28, 2007.
07 February 2014, 02:20 PM ET
This north-looking space wallpaper, acquired on Jan. 4, 2014, by the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) instrument on NASA's Terra spacecraft, shows the Sochi Olympic Park Coastal Cluster in Russia.
06 February 2014, 11:24 AM ET
A dramatic, fresh impact crater on Mars dominates this spectacular space wallpaper taken by the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter on Nov. 19, 2013.
05 February 2014, 12:05 PM ET
The faint spot at the center of this space wallpaper from ESO's Very Large Telescope is the Near-Earth Object 2009 FD. It may look insignificant, but there was a possibility that this asteroid would collide with the Earth in the future.
04 February 2014, 02:12 PM ET
This stunning space wallpaper shows a rainbow of lunar transits as seen by NASA's Solar Dynamics Observatory. The observatory watches the sun in many different wavelengths of light, which are each colorized in a different color.
03 February 2014, 01:34 PM ET
This space wallpaper is an artist's impression based on the first ever map of the weather on the surface of the nearest brown dwarf to Earth.
31 January 2014, 10:39 AM ET
The left-front wheel of NASA's Curiosity Mars rover shows dents and holes in this cool space wallpaper taken during the 469th Martian day, or sol, of the rover's work on Mars (Nov. 30, 2013).
30 January 2014, 04:10 PM ET
This space wallpaper shows a NASA NEOWISE mission image of comet C/2013 A1 Siding Spring, which is slated to make a close pass by Mars on Oct. 19, 2014.
29 January 2014, 10:31 AM ET
This stunning space wallpaper shows the Whirlpool Galaxy, also known as M51 or NGC 5194, which is one of the most spectacular examples of a spiral galaxy.
28 January 2014, 09:47 AM ET
The cosmic doppelgangers seen in the fascinating space wallpaper make up a double quasar known as QSO 0957+561, also known as the "Twin Quasar", which lies just under 14 billion light-years from Earth.
27 January 2014, 11:06 AM ET
This stunning space wallpaper is a false-color image from Japan’s ALOS satellite acquired over part of southern Kenya and the border with Tanzania. Mount Kilimanjaro in Tanzania can be seen in the lower-left corner.
24 January 2014, 10:01 AM ET
More than 100 asteroids were captured in this fascinating space wallpaper from NASA's Wide-field Infrared Survey Explorer, or WISE, during its primary all-sky survey.
23 January 2014, 05:22 PM ET
This cool space wallpaper shows a prototype Polish-built plasma thruster during test firing within an airless chamber at ESA’s Propulsion Laboratory.
22 January 2014, 10:20 AM ET
The VLT Survey Telescope at ESO's Paranal Observatory in Chile has captured this richly detailed space wallpaper of the Lagoon Nebula. This giant cloud of gas and dust is creating intensely bright young stars, and is home to young stellar clusters.
21 January 2014, 02:16 PM ET
This space wallpaper is an artist's illustration showing one of three newly discovered planets in the star cluster Messier 67. Image released Jan. 15, 2014.
17 January 2014, 10:07 AM ET
This new Hubble image shows a cosmic creepy-crawly known as the Tarantula Nebula in infrared light. This region is full of star clusters, glowing gas, and thick dark dust. Image released Jan. 9, 2014.
16 January 2014, 09:34 AM ET
This fascinating space wallpaper is an artist's concept of the MWC 656 system, which consists of a massive "Be" star and a companion black hole.
15 January 2014, 03:46 PM ET
This space wallpaper is a Hubble image showing the scatterings of bright stars and thick dust that make up spiral galaxy Messier 83, otherwise known as the Southern Pinwheel Galaxy.
14 January 2014, 03:20 PM ET
This space wallpaper shows a series of observations performed with the ESA/NASA Solar and Heliospheric Observatory (SOHO) to study the evolution of reconnection jets on a small patch of the Sun’s surface.
13 January 2014, 01:24 AM ET
This space wallpaper shows the remnant of Supernova 1987A seen in light of very different wavelengths.
10 January 2014, 03:09 PM ET
Floating at the center of this cool space wallpaper is a lidless purple eye, staring back at us through space. This ethereal object, known officially as [SBW2007] 1 but sometimes nicknamed SBW1, is a nebula with a giant star at its center.
09 January 2014, 04:30 PM ET
The stunning space wallpaper depicts a pulsar wind nebula, produced by the dense remnant of a star that exploded in a supernova. What's left behind is a pulsar, called PSR B1509-58 (B1509 for short).
08 January 2014, 11:02 AM ET
This amazing space wallpaper is Gemini Planet Imager’s first light image of Beta Pictoris b—a planet orbiting the star Beta Pictoris. The star, Beta Pictoris, is blocked in this image by a mask so its light doesn’t interfere with the light of the planet.