A transiting planet crosses its star, providing information to astronomers.
Hubble is the first major optical telescope in space. Above the distortion of the atmosphere, far above clouds and light pollution, Hubble has an unobstructed view of the universe.
Hubble Space Telescope 3D Model
NASA's Spitzer Space Telescope, launched in 2003, assisted in the discovery of planets beyond our solar system, including the detection of seven Earth-size planets orbiting the star TRAPPIST-1.
Spitzer Space Telescope 3D Model
The doomed egg-shaped exoplanet WASP-12b is a hot Jupiter that orbits so close to its parent star, it's being torn apart.
WASP-12b 3D Model
At only four light-years away, Proxima b is our closest known exoplanet neighbor.
Proxima b 3D Model
55 Cancri e is a super Earth exoplanet that orbits a G-type star. Its mass is 8.08 Earths, it takes 0.7 days to complete one orbit of its star, and is 0.01544 AU from its star. Its discovery was an...
55 Cancri e 3D Model
When we talk about the enormity of the cosmos, it’s easy to toss out big numbers – but far more difficult to wrap our minds around just how large, how far and how numerous celestial bodies really a...
Our Milky Way Galaxy: How Big is Space?
Planet Janssen, or 55 Cancri e, orbits a star called Copernicus only 41 light years away.
55 Cancri e: Skies Sparkle Above a Never-Ending Ocean of Lava
During 9.6 years in orbit, the Kepler space telescope observed more than half a million stars and discovered more than 2,600 planets. See the mission by the numbers.
NASA's Kepler Mission By the Numbers
NASA Associate Administrator Thomas Zurbuchen and TESS Project Scientist Padi Boyd discuss Kepler's legacy, the search for life and the big question: Are we alone?
Next Steps in the Search for Life
The stars TESS studies are 30 to 100 times brighter than those the Kepler mission and K2 follow-up surveyed, enabling far easier follow-up observations with both ground-based and space-based telesc...
Animation: Kepler Passes the Torch to TESS
NASA's Kepler mission revealed that there are more planets than stars in our galaxy. It opened our eyes to diverse worlds – some entirely unlike planets found in our solar system.
Kepler's Science Results
The Kepler space telescope will remain for decades in orbit around the Sun, weaving in and out of Earth’s orbital path.
NASA's Kepler Space Telescope: Final Orbit
Launched in March 2009, NASA’s first planet-hunter confirmed more than 2,600 planets beyond our solar system. "Many stars have planets. A lot of these planets are Earth-sized. That's Kepler's legac...
Kepler End of Flight Documentary
Send your love with a habitable planet valentine.
Tell someone they're unique, with our Earth valentine.
Keep your Valentine close with a tidally-locked planet, that always faces its star.
Celebrate your rocking single status with a rogue planet, the world without a star.
Rogue planet Valentine
For Valentine's Day, give the tight-knit Kepler-11 to your faves.
Planetary System Valentine
Celebrate Valetine's Day with a hot Jupiter that tightly hugs its star.
Hot Jupiter Valentine
Meet the astronauts, mathematicians, and directors leading NASA's most innovative missions to space.
Pioneers and Innovators: Women of Color
Kepler-186f is the first Earth-size planet discovered in the potentially 'habitable zone' around another star, where liquid water could exist on the planet's surface. Its star is much cooler and re...
Where the Grass is Always Redder
This artist's concept shows what the weather might look like on cool star-like bodies known as brown dwarfs. These giant balls of gas start life like stars, but lack the mass to sustain nuclear fus...
Storms on Brown Dwarfs
Artistic rendering of a planet's transmission spectrum
A Planet's Transmission Spectrum
Researchers are getting to know some of our sun's closest and smallest neighbors.
Free-floating failed star
Astronomers detect lowest-mass planet around a star like the sun found using direct imaging techniques.
Astronomers Image Lowest-mass Exoplanet Around a Sun-like Star
Explore Alien Worlds
Exoplanet Travel Bureau
This set of travel posters envision a day when the creativity of scientists and engineers will allow us to do things we can only dream of now.
Strange New Worlds
Explore an interactive gallery of some of the most intriguing and exotic planets discovered so far.
A planetary tour through time. The ancients debated the existence of planets beyond our own; now we know of thousands.