Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. New observations reveal ...

A team of astronomers monitoring interstellar object 3I/ATLAS have found something a little surprising. Our third confirmed interstellar visitor appears to have changed color for the second time.

Is it actually possible that a comet from another star system could change color right in front of our eyes and then broadcast its chemistry in X-rays? That’s exactly what is being observed by ...