Messiers & More: VIRGO BINOCULAR TOUR p. 28 Let's Party! : GLOBAL ASTRONOMY MONTH p. 34 See Mars: CLOSEST VIEW YOU'LL HAVE IN A DECADE p. 48 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 How to Choose Your Astro Camera p. 66 APRIL 2016 The Mystery of Our Two-Faced Moon p. 16 Test Report: Latest CCD From Starlight Xpress p. 58 Mapping Primordial Sound Waves p. 22 US $5.99 CAN $6.99 Leo's Starry Sickle p. 54 0 01 02 03 FnL1 CUYrVyBNZWRpYQ9HcmVnb3J5IEtydWVn ZXIAVo/XrQQxMC40AjgwATEFVVBDLUEM MDc0ODA4MDIyMDc2kQ== 03 0084 04 74808 02207 6 Display until March 28, 2016 Visit SkyandTelescope.com Download Our Free SkyWeek Apphttp://www.SkyandTelescope.com