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

Scientists have been working on ways to find new worlds far from Earth, and this strange method theorized decades ago has ...

Interstellar comets offer the tantalizing opportunity for us to touch something truly otherworldly,” says the European Space ...

How many dwarf planets are there in our solar system? The recent discovery of 2017 OF201 makes the tally anywhere between ...