Caltech Researchers Uncover 'Solid Evidence' For 'Planet Nine' Lurking In Outer Solar System Scientists say they finally have "solid evidence" for Planet X, a true ninth planet on the fringes of our solar system.
Earth's 'Bigger, Older Cousin': Scientists Hail Discovery Of Potentially Habitable PlanetEarth has an "older, bigger cousin" about 1,400 light years away, what officials say is the first planet known to be in a habitable zone orbiting a Sun-like star, scientists said Thursday.
NASA Spacecraft To Capture Close-Up Look At Dwarf PlanetScientists hope to get a close-up look this week at a planet about the size of Texas that's lurking in the asteroid belt located between Mars and Jupiter.
Cassini Releases Mosaic Image Of Earth During 'Wave At Saturn' If a picture says a thousand words, then you might say Planet Earth has spoken.
Wanna Boldly Go? Hundreds Volunteer For Proposed One-Way Mission To MarsIf you don't mind facing some stiff competition -- and spending the rest of your life on the Red Planet -- this could be the opportunity of a lifetime.