A single alien world can be misleading. A strange gas in an atmosphere might look promising, then turn out to come from ...

NASA's Kepler Space Telescope has discovered 2,784 distant alien worlds. While some orbit within habitable zones and look ...

A mysterious visitor from another star system is carrying secrets billions of years old. Its composition could reveal how ...

Planets orbiting such stars may have a better chance of retaining their atmospheres and developing conditions suitable for ...

Scientists are advancing a new way to search for life beyond Earth by looking not for a single decisive signal on one planet, but for recurring patterns across many worlds. The idea, set out in a ...

Scientists have found that young stellar cousins of our sun are calming down and dimming more quickly in their X-ray output ...

Usually, comets are dormant blocks of rock and ice. They only wake up when they get close to a star. The intense heat causes ...

Scientists find that planets need more than water to support life. Too little water may cause long-term overheating and ...

It’s not little green men with flying saucers and laser guns that scientists are worried about, instead our foes will be much ...

Scientists have found that young stellar cousins of our Sun are calming down and dimming more quickly in their X-ray output ...

Scientists have found that young stellar cousins of our Sun are calming down and dimming more quickly in their X-ray output ...

From lava tubes on Mars to ice pockets on Europa, subterranean environments may offer the best chance of finding life—and living safely—beyond our planet. “I was like, ‘OK, I'm pretty sure that ...