Before we say goodbye to our interstellar visitor, another close encounter is on its way. This one could be course-altering.

Initial analysis suggested the nucleus was approximately 13.7 kilometers wide (roughly city-sized); however, researchers ...

In a moment that sparked global curiosity and a touch of rivalry, China has revealed the first images of the mysterious interstellar comet 3I/ATLAS near Mars, while NASA’s remain unseen. With ...

The interstellar comet 3I/ATLAS has shifted from a routine curiosity to a physics puzzle, as NASA and other teams report that ...

CAPE CANAVERAL, Fla. (AP) — NASA unveiled close-up pictures on Wednesday of the interstellar comet that’s making a quick one-and-done tour of the solar system. Discovered over the summer, the comet ...