An Introductory Treatise To Physical Astronomy is a book written by Thomas Luby and published in 1828. The book is an introduction to the study of physical astronomy, which is the branch of astronomy that deals with the physical properties of celestial objects, such as their motion, composition, and structure. The book covers a wide range of topics, including the basics of celestial mechanics, the structure and properties of the solar system, the motions of the planets and their satellites, the nature of comets and meteors, and the properties of stars and galaxies. Luby's writing style is clear and concise, making the book accessible to readers with a basic understanding of mathematics and physics. The book is also illustrated with diagrams and charts to help readers visualize the concepts being discussed. Overall, An Introductory Treatise To Physical Astronomy is a valuable resource for anyone interested in the study of astronomy or the physical sciences. It provides a solid foundation for further study in the field and is an important historical document in the development of modern astronomy.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.