The Sun King

The sun is the monarch of the Solar System, but where does its kingdom end? At the furthest outposts, the two Voyager spacecraft are having a surprisingly turbulent time as they leave the sun's realm.

The team are at the Royal Observatory, Greenwich, to see how the sun affects our planet. Solar physicist Dr Lucie Green joins them to enjoy the observatory's historic telescopes, which are still being used to gaze at the night sky.