Out of the 6,000 known exoplanets, it's these rocky worlds that are most worthy of attention in the search for life beyond ...

Scientists might have just found Earth's icy, distant cousin a few hundred light-years away. HD 137010 b is one of thousands of exoplanets, or planets that orbit other stars, and is potentially the ...

Add Yahoo as a preferred source to see more of our stories on Google. This artist’s concept depicts a potential volcanic exomoon between the exoplanet WASP-49Ab, left, and its parent star.

While aliens in science fiction hop between planets on vast spaceships, scientists say real–life extraterrestrials might take a far less glamorous means of transport. When an asteroid slams into a ...