"I actually wanted to be an astronaut more than an astronomer for a quite a long time. Then I learned this would require I somehow become a US citizen (at the time Brits could not be ESA Astronauts because of the UK’s refusal to fund the human spaceflight part of ESA – although this has recently changed), and I also discovered how much detail I would be required to know about the space shuttle and just how fit I would have to be. I’m not really a detail oriented person, and I’m not that keen on the gym, so I gently switched my goal to becoming an astronomer! This also has the advantage of letting me keep my feet on the ground!"