Rock heir Jack Osbourne has set himself a new endurance challenge - he wants to travel to the moon in 2018.

The once-chubby hellraising son of rocker Ozzy Osbourne has stunned fans of the family's reality show The Osbournes by unveiling a new athletic physique in his new programme JACK OSBOURNE: Adrenaline Junkie.

In the show, Osbourne takes on a number of tough challenges including mountain climbing and Thai boxing - and now he has set his sights much higher.

The 19-year-old wants to be part of the recently announced NASA mission to the moon, in 13 years time.

He says, "Going to the moon would be amazing. The training's hardcore but I could handle it. I mean, I've got 13 years to prepare."