Many dream of it – but what are the qualities required? The BBC2 series Astronauts gave tough challenges to a group of 12 contenders, as one of them, physicist Dr Jaclyn Bell from Liverpool, describes.

Many dream of it – but what are the qualities required? The BBC2 series Astronauts gave tough challenges to a group of 12 contenders, as one of them, physicist Dr Jaclyn Bell from Liverpool, describes.