The basis of this book was a course at Princeton University, which was taught to scholars in the humanities by three famous astrophysicists - Neil deGrasse Tyson, Michael Strauss and John Richard Gott. They talk about what they love most, and they tell it in such a way that the most complex theories become understandable to non-specialists. Astronomers are not used to complicating something that can be simple. Large red stars are red giants. Small white stars are white dwarfs. If a star pulsates, it is called a pulsar. Even the beginning of all space, time, matter and energy that exists in space can be called in just two simple words: the Big Bang. What do we know about the Universe? Our Universe is great. Our Cosmos is much larger than it seems. He's hotter than you think. Tighter than you think. More rarefied than you think. No matter what you think about the Universe, reality will still be more incredible. Welcome to the Universe!