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

The US says its surprise pause on arms shipments is a one-off. But amid the turbulent US-Ukraine relationship, the assurance ...

We have discovered two interstellar objects so far, ’Oumuamua and Comet 2I/Borisov. ’Oumuamua had no dust tail and a significant nongravitational acceleration, which led to a wide variety of ...