Secrets of Our Universe

Tim takes a celestial journey to discover what makes the planets of our solar system so different from one another.

This time, Tim looks further out from our solar system, to the stars beyond, searching for answers to questions such as what are stars made of, how long do they live and what happens when they die?

Tim recalls one of the most daunting moments of a mission- his first space walk - and explores life onboard the space station, coping with weightlessness, space food... and going to the loo.