The "alien mothership" hypothesis for interstellar comet 3I/ATLAS is about to have a key test, as it hits solar conjunction and perihelion. What does that mean, and why is a Harvard professor of ...

Interstellar comet 3I/ATLAS accelerates mysteriously, raising questions about its origin and what it means for humanity.

As comet 3I/ATLAS nears its 29 October perihelion, scientists test whether its acceleration hints at alien propulsion—a bold 'mothership' theory led by Avi Loeb.

They caution that unusual does not automatically mean artificial, and more data is needed ... and look for anomalies that might support or refute the artificial-origin hypothesis. Meanwhile, space ...