The mysterious "interstellar visitor" that was recently spotted whizzing through the solar system may be around 3 billion years older than our cosmic neighborhood, a new study suggests. If confirmed, ...

Even though astronomers didn’t detect alien tech signals from a rare interstellar visitor, the results are worthwhile, they ...

News Analysis An object said be a new planet on the fringes of the solar system isn't a true planet but probably an alien interloper from a distant star, says an expert on solar system formation. A US ...