AstroFaqs 
Subtitle: Questions Astronomers Frequently Ask (Patrick Moore's Practical Astronomy Series)
Edition: 1 edition
Publisher: Springer
Published: September 15, 2000
Language: eng
Format: Paperback
Number of pages: 111
ISBN-13: 9781852332723
Subjects: Astronomical observation: observatories, equipment & methods; Popular astronomy; Astronomy (General); Science; Science/Mathematics; Star Observation; Astronomy; Science / Astronomy; Telescopes/Binoculars and Observing; Astronomy - General
First sentence: Two numbers, e.g. 10 x 50 or 11 x 80, designate a binocular.