School Reporters go stargazing with The Sky at Night's Maggie Aderin-Pocock
28 March 2014 Last updated at 18:32 GMT
School Reporters Amber, Natasha and Sophia from St Marylebone School in London interview physicist Dr. Maggie Aderin-Pocock on Radio 4's PM programme.
They quiz The Sky at Night presenter about a new small planet that astronomer have found on the edge of the solar system.
They find out how scientists found the planet, who will name it and if it means there is life in outer space