I bought this book when i was 10 years old Perhaps - It was the first experiment thing I've bought from my own money, and it what one of the best purchases in my life. This is more than a simple book about facts; Sagan is able to give the reader on impression of the fascination not only of astronomy, but of the triumph of science in general. The brilliance of the ancient Greeks, who Calculated the radius of the Earth only by the angle of an obelisk's shadow in Northern and Central Egypt. Kepler's genius and the elegance of its second law .... In addition, it covers many aspects of astronomy in a very interesting way. Extremely inspiring!