""An Introduction to Astronomy"" is a book written by Forest Ray Moulton and first published in 1916. It is a comprehensive guide to the study of astronomy, covering topics such as the solar system, the stars, the Milky Way galaxy, and the universe as a whole. The book is divided into several chapters, each of which focuses on a specific aspect of astronomy. It begins with an overview of the history of astronomy and the tools and techniques used by...