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A 15-yr-old schoolboy in UK has discovered a new planet orbiting a star 1000 light years away in our galaxy. He has become the youngest person ever to discover an alien planet after he found a new Jupiter-sized planet.

Tom Wagg was doing work-experience at Keele University, UK, when he spotted the planet two years ago by finding a tiny dip in the light of a star as a planet passed in front of it.  It took two years of further observations to prove that Wagg's discovery really is a planet.

I'm hugely excited to have a found a new planet and I'm very impressed that we can find them so far away, said Wagg, now aged 17.

Wagg found the planet by looking at data collected by the WASP (Wide Angle Search for Planets) project, which surveys the night skies monitoring millions of stars to look for the tell-tale tiny dips (transits) caused by planets passing in front of their host star.

Wagg's planet has been given the catalogue number WASP-142b, being the 142nd discovery by the WASP collaboration. It is in the Southern constellation of Hydra. The planet is the same size as Jupiter, but orbits its star in only two days. With such a short orbital period the transits occur frequently, making such planets much easier to find.

The planet is much too far away to see directly. The hemisphere facing the star is hot, blasted by the irradiation from the star, while the other hemisphere is much cooler. Wagg, a pupil at Newcastle-under-Lyme School, has always been keen on science and wants to study physics at university.

He asked for the work-experience week after learning that Keele University had a research group studying extra-solar planets. Professor Coel Hellier, who leads the WASP project at Keele said that tom is keen to learn about science, so it was easy to train him to look for planets.

The planet is one of a class of 'hot Jupiter' planets, which - unlike the planets in our own Solar System - have very tight orbits close to their stars. They are thought to have migrated inwards through interactions with another planet.

Thus, it is likely that Wagg's planet is not the only planet orbiting that star.