Book Review: ENCYCLOPEDIC DEEP-SKY HANDBOOK p. 65 Test Report: 3 GREAT $200 TELESCOPES p. 54 Daytime Challenge: MOON OCCULTS VENUS p. 46 T H E E S S E N T I A L G U I D E TO A S T R O N O M Y Dogs & Monsters: Winter Binocular Tour p. 32 DECEMBER 2015 100 Yearsof GENERAL RELATIVITY How Einstein Changed Astronomy p. 18 The Search for Gravitational Waves p. 26 Explore the Moon's Mare Humorum p. 48 Moonless Nights for Geminid Meteors p. 44 Deep-Sky Wonders: An Audience with the Queen p. 50 US $5.99 CAN $6.99 0 01 02 03 FnL1 CUYrVyBNZWRpYQ9HcmVnb3J5IEtydWVn ZXIAVfbPagQxMC40AjgwATEFVVBDLUEM MDc0ODA4MDIyMDc2kQ== 03 0084 12 74808 02207 6 Display until November 30, 2015 Visit SkyandTelescope.com Download Our Free SkyWeek Apphttp://www.SkyandTelescope.com