Add Yahoo as a preferred source to see more of our stories on Google. An illustration depicts what the surface of one of the exoplanets orbiting Barnard's Star may look like. The other three planets ...

A quartet of Earth-like worlds, each about 20% to 30% the size of our planet, circle one of our closest stellar neighbors, a ...

Scientists have discovered more than 6,000 planets beyond our solar system. What if some of them aren't planets at all, but ...

Barnard's Star, the second-nearest star system to Earth, has been found to have four tiny planets in its orbit in an 'exciting' discovery by astronomers. Each of the four discovered planets are only ...

An artist’s conception of the view from one of the four planets orbiting Barnard’s Star. Illustration by R. Proctor/J. Pollard/NOIRLab. Astronomers have revealed new evidence that there are not just ...

Astronomers have revealed new evidence that there are not just one but four tiny planets circling around Barnard's Star, the second-nearest star system to Earth. Astronomers have revealed new evidence ...

(CNN) — After decades of searching, astronomers have uncovered some of the strongest evidence yet of exoplanets orbiting Barnard’s Star, the nearest single star system to Earth. The four planets are ...

What was discovered in Flagstaff, Arizona, and killed off in Prague? If you answered "Pluto's planethood," your grasp of the astronomical is excellent. Feb. 18 marks the 95th anniversary of the ...

(Correction: An earlier version of this story misstated how far Pluto is from the sun. The correct number is 3.7 billion miles.) What was discovered in Flagstaff, Arizona, and killed off in Prague? If ...