The passage of the Moon across the night sky has long been a familiar, but mysterious, sight to man. Newton, with his laws of motion and inverse square law of gravity, was able to predict all the planetary orbits, at least in principle. However, an exact solution of the Moon's motion in the gravitational fields of the Sun and Earth defeated Newton and all his successors. The Motion of the Moon is a comprehensive account of the theoretical developments right up to the present day. All astronomers, physicists and mathematicians interested in the Moon will find this a very stimulating book.

Unlike some other reproductions of classic texts (1) We have not used OCR(Optical Character Recognition), as this leads to bad quality books with introduced typos. (2) In books where there are images such as portraits, maps, sketches etc We have endeavoured to keep the quality of these images, so they represent accurately the original artefact. Although occasionally there may be certain imperfections with these old texts, we feel they deserve to be made available for future generations to enjoy.

Visual Astronomy introduces the basics of observational astronomy, a fundamentally limitless opportunity to learn about the universe with your unaided eyes or with tools such as binoculars, telescopes, or cameras. The book explains the essentials of time a