An introductory guide to stargazing using binoculars. The advantages of stargazing with binoculars are that they are small, lightweight, inexpensive, and easy to transport and store. While the naked eye can only see stars up to the 6th magnitude, a 42mm aperture binocular can see stars up to the 9th magnitude, allowing you to see roughly 50 times more stars. (Excerpt from the text) There are no markings or writings, and the book is generally clean. Please understand that this is a used item before purchasing. Thank you for looking.