Tom Wagg was an intern at Keele University's observatory when he discovered the planet. An artist's impression of WASP-142b orbiting its star. (CNN) - Advice to interns: work hard and make your mark. And if you can discover a new planet while you're at it, you could also be pushing the boundaries of our knowledge. Believe it or not, a 15-year-old boy did just that, according to Keele University in England, UK. While undertaking work experience at the university, Tom Wagg noticed a tiny dip in the light of a star as a planet passed in front of it -- that planet had supposedly not been on anyone's radar until then. The university said it has since taken two years to verify his findings.