In this book you will find answers to the most frequently asked questions about space by the author, the famous astronomer Vladimir Surdin. What is the difference between a star and a planet, comets and asteroids? How and where are stars born? Are there stars 1000 times more massive than the Sun? How were the huge distances to stars and galaxies measured? How to escape from an asteroid? What do comets threaten us with? What are quasars and pulsars? And of course, the answer to the most popular question is: what are black holes? The answers are short and clear, and using any gadget and a QR code from the book, you can watch a video recording of the author's answer. We assimilate knowledge, improve our education at any age!For middle and high school age.