Light takes just eight minutes to reach Earth from the surface of the Sun - but its journey within the Sun takes hundreds of thousands of years. What is going on in there? How does the Sun produce light and heat - and how on earth did scientists find out? In this astonishing and enlightening adventure, you'll travel millions of miles from inside the Sun to its surface and to Earth, on the way discovering the latest research in solar physics, learning how the sun works and meeting the ground-breaking scientists who pieced this extraordinary story together.