Sun... Our ancestors sacrificed to him, composed solemn hymns in his honor, but did not know anything about his true nature. But the daring eye of the scientist found on its shining surface dark formations - spots. The Sun was found to be rotating on its axis. The vision of man penetrated into the secrets of the Sun further and further Scientists have learned that the Sun is an eternally boiling ocean of hot gases, from which fiery tongues rise for hundreds of thousands of kilometers. Now no one is thrown into the thrill of solar eclipses .. And there was a time when these phenomena horrified people .. About the Sun - its distance from the Earth, size, mass about sunspots and prominences about the atmosphere and interior of the Sun about the influence of the Sun on the Earth about how we get information about the processes taking place on the surface and in the interior of the radiant luminary, says this book. Life on Earth is due to the existence of the Sun .......... [ ) Energy reserves in the form of coal deposits, oil - the result of the activity of the Sun . [ But man uses not only the “fossil” reserves of sunlight......... [ Methods of "conservation" of solar radiation coming to us now are being developed Sunlight is also used directly in solar furnaces. This book is dedicated to a special chapter .. The book is popular, but written at a high scientific level. It will be available to a wide range of readers and will give a lot of valuable knowledge about the nearest star ..