Our galaxy is full of strange worlds, but what would happen if we could bring some of them into our own Solar System? Moving exoplanets closer helps us imagine how different stars, atmospheres, and ...

Scientists are looking into the possibility that 'alien spaceship' 3I/ATLAS could have come from within our own solar system. This would challenge the belief that the comet was an "interstellar object ...

Comet 3I/ATLAS appears to be unlike anything we've seen from interstellar space so far! Telescopes around the world are now tracking a new visitor to our celestial neighborhood. Streaking through at a ...

Add Yahoo as a preferred source to see more of our stories on Google. A deep image of interstellar Comet 3I/ATLAS captured by the Gemini Multi-Object Spectrograph (GMOS) on Gemini South at Cerro ...

Despite their (potentially) impressive numbers, these interstellar objects remain extremely difficult to observe. The odds of one venturing within 10 astronomical units—10 times the distance from ...

The most crowded alien planetary system found yet possesses five worlds all orbiting a star at least 12 times closer than Earth does the sun, researchers say. Investigators discovered these exoplanets ...

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 ...

Scientists peering at an alien solar system have spotted a pair of planets so different that their traits may be evidence of a massive collision. The key difference is in the planets' density — ...

Researchers tested whether they could detect unusual radio signals coming from an interstellar object passing through our ...

Is alien invasion armageddon coming for us in November? That's the speculation set off by a legitimate academic study recently published by a team of scientists. In early July, a previously ...

A recent study has renewed discussion about whether advanced extraterrestrial civilisations could leave detectable technosignatures within our own Solar System, including in the asteroid belt. In the ...

Astronomers have discovered an alien solar system in which six planets are orbiting a sunlike star, with five of the newfound worlds in close-knit configuration. Few stars have been observed with ...