This is a universal cosmology book written by famous physicist Li Miao for children. For thousands of years, human beings have never stopped exploring the world they live in and the starry sky they see. From measuring the circumference of the earth with sunlight to confirming the origin of the universe with electromagnetic waves, from inferring the shape of the earth based on lunar eclipse to measuring the distance between celestial bodies with standard candlelight With vivid and interesting stories, uncle Miao brings us back to the thinking scene of generations of great talents and opens up extraordinary scientific thinking. The book is also equipped with artistic illustrations and precious pictures of the universe. Young readers can open their imagination wings, think of the mysterious and charming universe from afar, and marvel at the magic of creation and human's endless thirst for knowledge.