100 questions in astronomy that everyone should know the answers to

In this book you will find answers to the most frequently asked questions addressed to the author — the renowned astronomer Vladimir Surdin — regarding space. What is the difference between a star and a planet, comets and asteroids? How and where do stars originate? Are there stars a thousand times more massive than the Sun? How were the vast distances to stars and galaxies measured? How to protect oneself from an asteroid? What threats do comets pose to us? What is a quasar and a pulsar? And of course, the answer to the most popular question: what are black holes? The answers are short and clear; additionally, by using any gadget and the QR code from the book, you can watch a video recording with the author's answers. Acquire knowledge, enhance your education at any age! Suitable for middle and high school students.