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 ...

Add Yahoo as a preferred source to see more of our stories on Google. A purple sphere in the bottom right with a smaller, bright orb in the top left There may be a habitable world at the Sun's closest ...

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 ...

Scientists may have found the first planet ever detected around our closest “solar twin,” a star called Alpha Centauri A, the same real-life star that was home to the fictional moon Pandora in James ...

Alpha Centauri is the closest star system to Earth, making it the most promising place to search for habitable planets. The Toliman Mission is designed specifically to detect Earth-sized worlds ...

Astronomers have used NASA's James Webb Space Telescope to find strong evidence for a planet orbiting a star in the triple system closest to our own sun. At just 4 light-years away from Earth, the ...

A light sail designed using artificial intelligence is about 1000 times thinner than a human hair and weighs as much as a grain of sand – and it could help us create a spacecraft capable of reaching ...

Reaching far away star systems has long been a human dream. There is theory that a ship longer than a city could take people on a centuries long journey.