Alpha Centauri, one of the two "Pointer Stars" that help stargazers find the Southern Cross in the Southern Hemisphere, may have a planet in orbit around it. If it does, the Webb Telescope will find ...

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 ...

Finding a habitable planet in the nearest star system is an ongoing quest. But the overall habitability of the Alpha Centauri system based on its three stars, just over 4 light-years away, could be ...