NASA’s Kepler space telescopespotted thousands of worlds during its four-year mission, proving that our galaxy is filled with planets. But even more surprising is what the Kepler database highlights ...

NASA's Juno probe has flown closer to Jupiter and its largest moon, Ganymede, than any other spacecraft in more than two decades — and the images it beamed back of the gas giant and its icy orb are ...

If star-hopping aliens ever visited our solar system, Saturn is probably the planet they'd remember. The seven giant rings circling its equator make Saturn the most distinct planet orbiting the sun.