MILKY WAY HALO: Ghosts of Our Galaxy's Past THROUGH THE SCOPE: Hunt Dusty Galactic Cirrus TEST REPORT: 16-Megapixel Lucky Imaging Camera PAGE 22 PAGE 30 PAGE 58 THE ESSENTIAL GUIDE TO ASTRONOMY What We've Learned About MARS CURIOSITY UPDATE PAGE 14 Amateurs Track Disintegrating Planet PAGE 66 Jupiter at Its Closest PAGE 48 Deep-Sky Wonders: Roar Through Leo PAGE 54 Perfect Your Narrowband Images PAGE 36 APRIL 2017 skyandtelescope.comhttp://www.skyandtelescope.com