The galaxy cluster called MOO J1142+1527 can be seen here as it existed when light left it 8.5 billion years ago. The red galaxies at the center of the image from NASA's Spitzer make up the heart of the galaxy cluster.
Scores of baby stars shrouded by dust are revealed in this infrared image of the star-forming region NGC 2174, as seen by NASA's Spitzer Space Telescope. Found in the constellation Orion, NGC 2174 is located around 6,400 light-years away.
This sky map shows the location of the star HD 219134 (circle), host to the nearest confirmed rocky planet found to date outside of our solar system. The star lies just off the 'W' shape of the constellation Cassiopeia.
Little Black Spot on the Star Today (Artist's Concept)
This artist's conception shows the silhouette of a rocky planet, dubbed HD 219134b, as it passes in front of its star. At 21 light-years away, the planet is the closest outside of our solar system that can be seen crossing, or transiting, its star.
NASA Missions Have Their Eyes Peeled on Pluto (Artist's Concept)
This artist's concept shows NASA's fleet of observatories busily gathering data before and after July 14, 2015 to help piece together what we know about Pluto, and what features New Horizons data might help explain.
This artist's concept shows a hypothetical 'rejuvenated' planet,a gas giant that has reclaimed its youthful infrared glow. NASA's Spitzer Space Telescope found tentative evidence for one such planet around a dead star, or white dwarf, called PG 0010+280.
NASA's Spitzer Space Telescope observed a proposed helium planet, GJ 436b.This diagram illustrates how hypothetical helium atmospheres might form. These would be on planets about the mass of Neptune, or smaller.
Planets having atmospheres rich in helium may be common in our galaxy, according to a new theory based on data from NASA's Spitzer Space Telescope. This artist's concept depicts a proposed helium-atmosphere planet called GJ 436b.
Astronomers using data from NASA's WISE are helping to trace the shape of our Milky Way galaxy's spiral arms. Here, WISE data revealed clusters of young stars shrouded in dust, called embedded clusters, which are known to reside in spiral arms.
This picture from NASA's NuSTAR is one of the most detailed ever taken of the center of our galaxy in high-energy X-rays. The X-ray light, normally invisible to our eyes, has been assigned the color magenta.
Map of Exoplanets Found in Our Galaxy (Artist's Concept)
This artist's map of the Milky Way shows the location of one of the farthest known exoplanets, lying 13,000 light-years away. Most of the thousands of exoplanets discovered to date are closer to our solar system, as indicated by the pink/orange areas.