I still dream about being on the space station with the feeling of being weightless. The weightlessness is the most amazing, relaxing and natural feeling.

When the history books are written in a thousand years, when space travel would have become routine, the moment that humans first left Earth will be of huge importance. Star City is a central part of this story and it deserves more recognition.

During launch, the outside of the rocket is covered in a protective fairing, so we couldn't see outside, but as soon as that was jettisoned, my first view of the earth was over the Pacific Ocean, which was this wonderful deep blue, with clouds just over the top, and sunlight streaming in through the window.

Is a one-way trip to Mars ever really seriously going to happen? Surely that's morally reprehensible. However old people are, however much they say they want to go on a one-way mission, people should be thinking about the possibility of returning.

You don't go into space just for the science. Economically, it is not worth it. I think the reason we should be in space is for the exploration; it's the human endeavour.