Two thousand years ago, the Sun was a character in many legends, a mythical spirit or even a god. For a long time it was believed that the daylight moves around the center of the world - the Earth. Four hundred years ago, people looked at the Sun through the first telescopes - and could not believe what they saw. Today the Sun is studied by several thousand specialists, but what do we know about it? How did we get this knowledge? This book is not only about the Sun itself, but also about our ideas about it. About how speculative reasoning was replaced by scientific hypotheses, and old hypotheses by new ones. About how they study something that cannot be touched, and why such knowledge is reliable. About how complex and dramatic the path of solar explorers can be. And, of course, about all the most interesting things that happen on our star.