This artist's concept depicts 'heartbeat stars,' which have been detected by NASA's Kepler Space Telescope. Two heartbeat stars are seen swerving close to one another in their closest approach along their highly elongated orbits around one another.
This illustration based on computer modeling and data from NASA's Kepler Space Telescope, represents how hot Jupiters of different temperatures and different cloud compositions might appear while flying over the dayside of these planets on a spaceship.
NASA's planet-hunting Kepler spacecraft observed the comet during the final month of the Rosetta mission, while the comet was not visible from Earth. This is a frame from an animation composed of images from Kepler of the comet.
Cool Star Marked by Long-Lived Storm (Artist's Concept)
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.
Of the 1,030 confirmed planets from Kepler, a dozen are less than twice the size of Earth and reside in the habitable zone of their host stars. In this diagram, the sizes of the exoplanets are represented by the size of each sphere.
The tightly packed system, named Kepler-444, is home to five small planets in very compact orbits. The planets were detected from the dimming that occurs when they transit the disk of their parent star, as shown in this artist's conception.
A plot of the transmission spectrum for exoplanet HAT-P-11b, with data from NASA's Kepler, Hubble and Spitzer observatories combined. The results show a robust detection of water absorption in the Hubble data.
Using data from NASA's Kepler and Spitzer Space Telescopes, scientists have made the most precise measurement ever of the size of a world outside our solar system, as illustrated in this artist's conception.
Kepler-186f, the First Earth-size Planet in the Habitable Zone (Artist's Concept)
This artist's concept depicts Kepler-186f, the first validated Earth-size planet to orbit a distant star in the habitable zone, a range of distance from a star where liquid water might pool on the planet's surface.
On March 6, 2009, NASA's Kepler Space Telescope rocketed into the night skies above Cape Canaveral Air Force Station in Florida to find planets around other stars, called exoplanets, in search of potentially habitable worlds.