A potential gas giant recently discovered orbiting in the habitable zone of one of the closest stars to Earth could have a moon capable of sustaining life — just like the alien world "Pandora" from ...

One million alien visitors from another star system could already be lurking in the solar system. We aren't talking about "little green men" here, however — more "little (and not so little) gray rocks ...

In some of its most ambitious work yet, the James Webb Space Telescope looked to spot a planet in a potentially habitable orbit around Alpha Centauri A, the nearest sunlike star to our solar system ...