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The structure of the Sun's corona shows well in this image from NASA's Solar TErrestrial RElations Observatory (STEREO)
The structure of the Sun's corona shows well in this image from NASA's Solar TErrestrial RElations Observatory (STEREO)

Full Disk Image of the Sun, March 26, 2007

The image taken by the Oschin Schmidt Telescope, shows the star AC +79 3888, also known as Gliese 445. NASA's Voyager 1 spacecraft, which is on a trajectory out of our solar system, is headed toward an encounter with AC +79 3888 (circled in red).
The image taken by the Oschin Schmidt Telescope, shows the star AC +79 3888, also known as Gliese 445. NASA's Voyager 1 spacecraft, which is on a trajectory out of our solar system, is headed toward an encounter with AC +79 3888 (circled in red).

Heading toward Gliese 445

This artist's concept shows NASA's two Voyager spacecraft exploring a turbulent region of space known as the heliosheath, the outer shell of the bubble of charged particles around our sun.
This artist's concept shows NASA's two Voyager spacecraft exploring a turbulent region of space known as the heliosheath, the outer shell of the bubble of charged particles around our sun.

Voyagers in the Heliosheath (Cropped)

Radio telescopes cannot see Voyager 1 in visible light, but rather
Radio telescopes cannot see Voyager 1 in visible light, but rather

Voyager Signal Spotted By Earth Radio Telescopes

This composite image combines NASA's Extreme Ultravoilet Imaging Telescope images from three wavelengths into one that reveals solar features unique to each wavelength.
This composite image combines NASA's Extreme Ultravoilet Imaging Telescope images from three wavelengths into one that reveals solar features unique to each wavelength.

Color Composite of Solar Features

The dark region seen on the face of the sun at the end of March 2013 is a coronal hole (just above and to the right of the middle of the picture), which is a source of fast solar wind leaving the sun in this image from NASA's Solar Dynamic Observatory.
The dark region seen on the face of the sun at the end of March 2013 is a coronal hole (just above and to the right of the middle of the picture), which is a source of fast solar wind leaving the sun in this image from NASA's Solar Dynamic Observatory.

Pulses from the Sun

NASA's Solar TErrestrial RElations Observatory (STEREO) satellites have provided the first three-dimensional images of the Sun. The structure of the corona shows well in this image.
NASA's Solar TErrestrial RElations Observatory (STEREO) satellites have provided the first three-dimensional images of the Sun. The structure of the corona shows well in this image.

Full Disk Image of the Sun, March 26, 2007 (Anaglyph)

NASA's Extreme Ultraviolet Imaging Telescope aboard ESA's SOHO spacecraft took this image of a huge, handle-shaped prominence in 1999. Prominences are huge clouds of relatively cool dense plasma suspended in the Sun's hot, thin corona.
NASA's Extreme Ultraviolet Imaging Telescope aboard ESA's SOHO spacecraft took this image of a huge, handle-shaped prominence in 1999. Prominences are huge clouds of relatively cool dense plasma suspended in the Sun's hot, thin corona.

Handle-shaped Prominence

The structure of the Sun's corona shows well in this image from NASA's Solar TErrestrial RElations Observatory (STEREO) satellite.
The structure of the Sun's corona shows well in this image from NASA's Solar TErrestrial RElations Observatory (STEREO) satellite.

Close-up View of an Active Region of the Sun, March 23, 2007

This view from NASA's Solar TErrestrial RElations Observatory satellite will aid scientists' ability to understand solar physics to improve space weather forecasting.
This view from NASA's Solar TErrestrial RElations Observatory satellite will aid scientists' ability to understand solar physics to improve space weather forecasting.

Closer View of the Equatorial Region of the Sun, March 24, 2007

NASA's Solar TErrestrial RElations Observatory satellites have provided the first 3-dimensional images of the Sun. This view will aid scientists' ability to understand solar physics to improve space weather forecasting. .
NASA's Solar TErrestrial RElations Observatory satellites have provided the first 3-dimensional images of the Sun. This view will aid scientists' ability to understand solar physics to improve space weather forecasting. .

Close-up View of an Active Region of the Sun, March 23, 2007 (Anaglyph)

An artist's concept illustrates the positions of the Voyager spacecraft in relation to structures formed around our Sun by the solar wind.
An artist's concept illustrates the positions of the Voyager spacecraft in relation to structures formed around our Sun by the solar wind.

Voyager Approaches Final Frontier

This artist's concept shows the general locations of NASA's two Voyager spacecraft. Voyager 1 (top) has sailed beyond our solar bubble into interstellar space. Voyager 2 (bottom) is still exploring the outer layer of the solar bubble.
This artist's concept shows the general locations of NASA's two Voyager spacecraft. Voyager 1 (top) has sailed beyond our solar bubble into interstellar space. Voyager 2 (bottom) is still exploring the outer layer of the solar bubble.

One Voyager Out, One Voyager In (Artist Concept)

This artist's concept shows the different expected directions of the magnetic fields in interstellar space (black lines) and the magnetic field emanating from our sun (white lines) as NASA's Voyager 1 spacecraft travels northward out of the heliosphere.
This artist's concept shows the different expected directions of the magnetic fields in interstellar space (black lines) and the magnetic field emanating from our sun (white lines) as NASA's Voyager 1 spacecraft travels northward out of the heliosphere.

Solar and Interstellar Magnetic Fields

Voyager 1 has entered interstellar space. NASA's spacecraft, which rose from Earth on a September morning 36 years ago, has traveled farther than anyone, or anything, in history.
Voyager 1 has entered interstellar space. NASA's spacecraft, which rose from Earth on a September morning 36 years ago, has traveled farther than anyone, or anything, in history.

Voyager Goes Interstellar (Artist Concept)

NASA's Solar TErrestrial RElations Observatory satellites have provided the first 3-dimensional images of the Sun. This view will aid scientists' ability to understand solar physics to improve space weather forecasting.
NASA's Solar TErrestrial RElations Observatory satellites have provided the first 3-dimensional images of the Sun. This view will aid scientists' ability to understand solar physics to improve space weather forecasting.

Closer View of the Equatorial Region of the Sun, March 24, 2007 (Anaglyph)

This artist's concept depicts NASA's Voyager 1 spacecraft entering interstellar space.
This artist's concept depicts NASA's Voyager 1 spacecraft entering interstellar space.

Voyager 1 Entering Interstellar Space (Artist Concept)

This visual represents sounds captured of interstellar space by NASA's Voyager 1 spacecraft. Voyager 1's plasma wave instrument detected the vibrations of dense interstellar plasma.
This visual represents sounds captured of interstellar space by NASA's Voyager 1 spacecraft. Voyager 1's plasma wave instrument detected the vibrations of dense interstellar plasma.

Voyager Captures Sounds of Interstellar Space

Data from NASA's Cassini spacecraft have enabled scientists to create this map of the heliosphere, the bubble of charged particles around our sun. Charged particles stream out from our sun in a phenomenon known as solar wind.
Data from NASA's Cassini spacecraft have enabled scientists to create this map of the heliosphere, the bubble of charged particles around our sun. Charged particles stream out from our sun in a phenomenon known as solar wind.

Mapping the Heliosphere

This schematic shows our solar bubble moving through nearby interstellar space, or the space between stars.
This schematic shows our solar bubble moving through nearby interstellar space, or the space between stars.

Heliosphere Traveling Through Interstellar Space

This graphic shows the different streams of charged particles inside the bubble around our sun and outside, in the unexplored territory of interstellar space. The heliosheath, where NASA's two Voyager spacecraft are now traveling, is shown in red.
This graphic shows the different streams of charged particles inside the bubble around our sun and outside, in the unexplored territory of interstellar space. The heliosheath, where NASA's two Voyager spacecraft are now traveling, is shown in red.

Streams of Charged Particles

This artist's concept shows NASA's Voyager spacecraft against a backdrop of stars.
This artist's concept shows NASA's Voyager spacecraft against a backdrop of stars.

Voyager in Space (Artist Concept)

This image from a set of animations show NASA's Voyager 1 spacecraft exploring a new region in our solar system called the 'magnetic highway'.
This image from a set of animations show NASA's Voyager 1 spacecraft exploring a new region in our solar system called the 'magnetic highway'.

Voyager 1 Explores the 'Magnetic Highway'

This panel illustrates the transit of the martian moon Phobos across the Sun. It is made up of images taken by NASA's Mars Exploration Rover Opportunity.
This panel illustrates the transit of the martian moon Phobos across the Sun. It is made up of images taken by NASA's Mars Exploration Rover Opportunity.

Martian Moon Eclipses Sun, in Stages

This artist's concept shows how NASA's Voyager 1 spacecraft is bathed in solar wind from the southern hemisphere flowing northward. This phenomenon creates a layer of giant bubble of solar ions just inside the outer boundary of the heliosphere.
This artist's concept shows how NASA's Voyager 1 spacecraft is bathed in solar wind from the southern hemisphere flowing northward. This phenomenon creates a layer of giant bubble of solar ions just inside the outer boundary of the heliosphere.

The Sun's Southern Wind Flows Northward

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