Overview: In this episode we take a journey around the Sun. With the help of spectacular images we will discover the secrets of this star of ours; how it influences life and our existence, how the Solar System was formed. There would be no life on Earth without the Sun: we understand why. We see how tiny variations in the Earth's motion affect how the Sun warms us, causing drastic changes in the climate. We need light, also to maintain a good mood. We go to a small Austrian village willing to do anything to have a little sunshine. There are many Moons in the Solar System: let's see how ours was born, and what tricks we should adopt to live on it. Human beings have always been intrigued by the Sun. To the point of transforming it into a deity and worshiping it in Sun cults. Alberto Angela takes us to Peru to visit one of the most spectacular archaeological sites in the world which is part of the heritage. of humanity: Machu Picchu.