Solar systems mostly keep to themselves. What’s ours is ours and what’s not is not. Stars are simply too far from each ...

Beyond the fact that this is the third known interstellar object to have entered our solar system, “we don’t know very much,” ...

The European Space Agency said Wednesday that scientists have discovered what might be only the third known interstellar ...

Based on the comet's brightness and current distance — it's located just inside Jupiter's orbit — scientists estimate its ...