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 ...

An interstellar visitor to our solar system known as 3I/ATLAS has captivated the public for months, and it's not hard to see why. But for scientists around the world, the discovery that 3I/ATLAS is ...