Summary:
- Astronomers have detected a mysterious object passing through our solar system that may be an interstellar comet or even an alien spacecraft.
- The object, named Comet 3I/ATLAS, was first observed in 2019 and is the second known interstellar object to visit our solar system after the famous 'Oumuamua.
- Avi Loeb, a Harvard professor, believes Comet 3I/ATLAS could be an alien spacecraft, based on its unusual properties and trajectory, and has called for further investigation to determine its true nature.