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

Congressional passage of a massive bill cuts billions of dollars in spending across many areas including clean energy.

The newest visitor is 416 million miles (670 million kilometers) from the sun, out near Jupiter. NASA said the comet will ...

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 ...