A mysterious visitor from another solar system could be an alien spacecraft, according to a leading Harvard astronomer.

The team found that the planet, dubbed HIP 67522 b, orbits its parent star so tightly that it appears to cause frequent ...

Independence Day live-tweeting of the events of Roland Emmerich's classic is catching social media users off guard once again ...

Astronomers have spotted an alien planet orbiting so closely to its home star, the planet's magnetic field is triggering ...