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Featured (209)
Sun (81)
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Earth (1254)
Mars (3847)
Jupiter (147)
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Dwarf Planets (551)
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The Universe (929)
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This artist's conception compares the KOI-961 planetary system to Jupiter and the largest four of its many moons. The KOI-961 planetary system hosts the three smallest planets known to orbit a star beyond our sun.
This artist's conception compares the KOI-961 planetary system to Jupiter and the largest four of its many moons. The KOI-961 planetary system hosts the three smallest planets known to orbit a star beyond our sun.

'Honey I Shrunk the Planetary System' (Artist Concept)

This graph illustrates the Cepheid period-luminosity relationship, used to calculate the size, age and expansion rate of the universe. The data shown are from NASA's Spitzer Space Telescope which has made the most precise measurements yet.
This graph illustrates the Cepheid period-luminosity relationship, used to calculate the size, age and expansion rate of the universe. The data shown are from NASA's Spitzer Space Telescope which has made the most precise measurements yet.

Cepheids as Cosmology Tools

This series of images from NASA's Spitzer Space Telescope shows a dark mass of gas and dust, called a core, where new stars and planets will likely spring up. This particular core lies deep within a larger dark cloud called L183.
This series of images from NASA's Spitzer Space Telescope shows a dark mass of gas and dust, called a core, where new stars and planets will likely spring up. This particular core lies deep within a larger dark cloud called L183.

An Unexpected Scattering of Light

The galaxies pictured here have so much dust surrounding them that the brilliant light from their quasars cannot be seen in these images from NASA's Hubble Space Telescope.
The galaxies pictured here have so much dust surrounding them that the brilliant light from their quasars cannot be seen in these images from NASA's Hubble Space Telescope.

The Homes of Quasars

A hypothetical planet is depicted in this artist's concept moving through the habitable zone and then further out into a long, cold winter.
A hypothetical planet is depicted in this artist's concept moving through the habitable zone and then further out into a long, cold winter.

Eccentric Habitable Zones (Artist's Concept)

This image zooms in on the region around the first 'hot DOG' (red object in magenta circle), discovered by NASA's Wide-field Infrared Survey Explorer, or WISE. Hot DOGs are hot dust-obscured galaxies.
This image zooms in on the region around the first 'hot DOG' (red object in magenta circle), discovered by NASA's Wide-field Infrared Survey Explorer, or WISE. Hot DOGs are hot dust-obscured galaxies.

Extremely Bright and Extremely Rare

Two large elliptical galaxies, NGC 4889 and NGC 4874 are shown in this image from NASA's Spitzer Space Telescope.
Two large elliptical galaxies, NGC 4889 and NGC 4874 are shown in this image from NASA's Spitzer Space Telescope.

Dwarfs in Coma Cluster

This image shows the first-ever map of the surface of an exoplanet, or a planet beyond our solar system. Showing temperature variations across the cloudy tops of a gas giant called HD 189733b, the infrared data is taken by NASA's Spitzer Space Telescope.
This image shows the first-ever map of the surface of an exoplanet, or a planet beyond our solar system. Showing temperature variations across the cloudy tops of a gas giant called HD 189733b, the infrared data is taken by NASA's Spitzer Space Telescope.

First Map of Alien World (animation)

This artist's animation shows a typical young galaxy, teeming with hot, newborn stars and exploding supernovas. The supernovas are seen as white flashes of light.
This artist's animation shows a typical young galaxy, teeming with hot, newborn stars and exploding supernovas. The supernovas are seen as white flashes of light.

Fires of Galactic Youth (Artist Animation)

This artist's concept illustrates how planetary systems arise out of massive collisions between rocky bodies. NASA's Spitzer Space Telescope show that these catastrophes continue to occur around stars even after they have developed full-sized planets.
This artist's concept illustrates how planetary systems arise out of massive collisions between rocky bodies. NASA's Spitzer Space Telescope show that these catastrophes continue to occur around stars even after they have developed full-sized planets.

The Rocky World of Young Planetary Systems (Artist Concept)

In the image from NASA's Hubble Space Telescope, angelic figures take on the form of the galactic group called Stephan's Quintet.
In the image from NASA's Hubble Space Telescope, angelic figures take on the form of the galactic group called Stephan's Quintet.

Stephan's Quintet

Astronomers have found unexpected rings and arcs of ultraviolet light around a selection of galaxies, four of which are shown here as viewed by NASA's and the European Space Agency's Hubble Space Telescope.
Astronomers have found unexpected rings and arcs of ultraviolet light around a selection of galaxies, four of which are shown here as viewed by NASA's and the European Space Agency's Hubble Space Telescope.

Ultraviolet Ring Around the Galaxies

This image from NASA's Wide-field Infrared Survey Explorer, shows four galaxies in the Virgo cluster: Messier 59, Messier 60, NGC 4647, and NGC 4638. It also shows the tracks of three asteroids, which appear in this image as trails of green dots.
This image from NASA's Wide-field Infrared Survey Explorer, shows four galaxies in the Virgo cluster: Messier 59, Messier 60, NGC 4647, and NGC 4638. It also shows the tracks of three asteroids, which appear in this image as trails of green dots.

Asteroids in Virgo

When astronomers first looked at images of a supernova remnant called Cassiopeia A, captured by NASA's NuSTAR. The mystery of Cassiopeia A (Cas A), a massive star that exploded in a supernova more than 11,000 years ago continues to confound scientists.
When astronomers first looked at images of a supernova remnant called Cassiopeia A, captured by NASA's NuSTAR. The mystery of Cassiopeia A (Cas A), a massive star that exploded in a supernova more than 11,000 years ago continues to confound scientists.

The Case of Missing Iron in Cassiopeia A

ESA's Herschel Space Observatory has discovered a giant, galaxy-packed filament ablaze with billions of new stars. The filament connects two clusters of galaxies that, along with a third cluster, will smash together in several billion years.
ESA's Herschel Space Observatory has discovered a giant, galaxy-packed filament ablaze with billions of new stars. The filament connects two clusters of galaxies that, along with a third cluster, will smash together in several billion years.

A Star-Bursting Filament

The magnetic field of our Milky Way galaxy as seen by ESA's Planck satellite. This image was compiled from the first all-sky observations of polarized light emitted by interstellar dust in the Milky Way.
The magnetic field of our Milky Way galaxy as seen by ESA's Planck satellite. This image was compiled from the first all-sky observations of polarized light emitted by interstellar dust in the Milky Way.

Magnetic Map of Milky Way

This illustration shows the unusual orbit of planet Kepler-413b around a close pair of orange and red dwarf stars. The planet's 66-day orbit is tilted 2.5 degrees with respect to the plane of the binary stars' orbit.
This illustration shows the unusual orbit of planet Kepler-413b around a close pair of orange and red dwarf stars. The planet's 66-day orbit is tilted 2.5 degrees with respect to the plane of the binary stars' orbit.

Wobbly Planet Orbital Schematic (Illustration)

This image of the microwave sky was synthesized using data spanning the range of light frequencies detected by ESA's Planck. A vast portion of the sky is dominated by the diffuse emission from gas and dust in our Milky Way galaxy.
This image of the microwave sky was synthesized using data spanning the range of light frequencies detected by ESA's Planck. A vast portion of the sky is dominated by the diffuse emission from gas and dust in our Milky Way galaxy.

Planck's View of the Whole Sky

This image from NASA's Hubble Space Telescope shows Herbig-Haro 30, the prototype of a gas-rich 'young stellar object' disk around a star.
This image from NASA's Hubble Space Telescope shows Herbig-Haro 30, the prototype of a gas-rich 'young stellar object' disk around a star.

Dark Disks Around Young Stars

NASA's Spitzer Space Telescope has detected the solid form of buckyballs in space for the first time. To form a solid particle, the buckyballs must stack together, as illustrated in this artist's concept showing the very beginnings of the process.
NASA's Spitzer Space Telescope has detected the solid form of buckyballs in space for the first time. To form a solid particle, the buckyballs must stack together, as illustrated in this artist's concept showing the very beginnings of the process.

Building a Buckyball Particle in Space (Artist Concept)

NASA's Great Observatories continue Galileo's legacy with stunning images and breakthrough science from the Hubble Space Telescope, the Spitzer Space Telescope, and the Chandra X-ray Observatory.
NASA's Great Observatories continue Galileo's legacy with stunning images and breakthrough science from the Hubble Space Telescope, the Spitzer Space Telescope, and the Chandra X-ray Observatory.

NASA's Great Observatories Celebrate the International Year of Astronomy

The tangled arms of the Pinwheel galaxy, otherwise known as Messier 101, are decked out in red in this new infrared image from NASA's Spitzer Space Telescope.
The tangled arms of the Pinwheel galaxy, otherwise known as Messier 101, are decked out in red in this new infrared image from NASA's Spitzer Space Telescope.

Pinwheel Looks 'Fab' in Infrared

The third closest star system to the sun, called WISE J104915.57-531906, center of large image, which was taken by NASA's WISE. It appeared to be a single object, but a sharper image from Gemini Observatory, revealed that it was binary star system.
The third closest star system to the sun, called WISE J104915.57-531906, center of large image, which was taken by NASA's WISE. It appeared to be a single object, but a sharper image from Gemini Observatory, revealed that it was binary star system.

Brown Dwarfs in our 'Backyard'

This illustration shows a cool star, called W1906+40, marked by a raging storm near one of its poles. The storm is thought to be similar to the Great Red Spot on Jupiter. Scientists discovered it using NASA's Kepler and Spitzer space telescopes.
This illustration shows a cool star, called W1906+40, marked by a raging storm near one of its poles. The storm is thought to be similar to the Great Red Spot on Jupiter. Scientists discovered it using NASA's Kepler and Spitzer space telescopes.

Cool Star Marked by Long-Lived Storm (Artist's Concept)

This artist's impression depicts the accretion disc surrounding a black hole, in which the inner region of the disc precesses. 'Precession' means that the orbit of material surrounding the black hole changes orientation around the central object.
This artist's impression depicts the accretion disc surrounding a black hole, in which the inner region of the disc precesses. 'Precession' means that the orbit of material surrounding the black hole changes orientation around the central object.

Black Hole with 'Wobbling' Disk (Artist Concept)

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