Professor Avi Loeb, a theoretical physicist and cosmologist from Harvard University, told MailOnline why he thinks a new ...

A newly discovered object from deep space may be the oldest comet ever observed—possibly more than 7 billion years old, and ...

Astronomers are racing to study our solar system's newest 'interstellar visitor.' Here's why. Delta passengers were stranded on a tiny island in the middle of the Atlantic for 29 hours after midair ...

British astronomers may have solved the mystery of an "interstellar object" hurtling towards our planet. Scientists believe the mysterious interstellar visitor may be the oldest comet ever observed.