An unusually comet has entered the Solar system. It poses no harm to Earth, say astronomers. That's the good news. Then one astronomer has made an outrageous claim: It is, quite possibly, an alien ...

An intruder from outer space is zooming through our solar system, and a spacecraft launched to study Jupiter can provide ...

A new interstellar object in the solar system should be investigated for the possibility that it's an alien craft, according ...