Comet 3I/ATLAS, an object from another star that was found speeding through our solar system last summer, is now fading from ...

Scientists studying 3I/ATLAS have detected unusually high levels of heavy water, indicating it formed in an extremely cold ...

Astronomers have discovered a remarkable planetary system where three very different objects orbit a distant star—and their ...

Comets are often treated as leftovers, but sometimes the leftovers become the primary focus. That is the case with 3I/ATLAS, only the third known interstellar object seen crossing the solar system, ...