An object dubbed 3I/ATLAS is only the third interloper from outside the Solar System seen in all of human history.

A new investigation into old Kepler data has revealed that a planetary system once thought to house zero planets actually has ...

For only the third time in history, astronomers have detected a new interstellar visitor — an object from another star — blitzing into our solar system.

All eyes are on Comet 3I/Atlas as astronomers worldwide chase the exotic ice ball through our solar system ...