Uranus

Our solar system may have had a fifth 'Giant' planet

According to a new study, our system was once home to a fifth gas giant that suddenly vanished some 4 billion years ago after a run-in with Neptune.

August 17, 2015
August 17, 2015

Our solar system may have had a fifth 'Giant' planet

According to a new study, our system was once home to a fifth gas giant that suddenly vanished some 4 billion years ago after a run-in with Neptune.