INFRARED REVOLUTION: TION: DIY: DEEP-SKY WONDERS: Spitzer's Legacy y Make a Focus Mask Treasures of Auriga PAGE 18 PAGE 30 PAGE 54 THE ESSENTIAL GUIDE TO ASTRONOMY JANUARY 2020 Do Microbes Hide Beneath Mars's Surface? Page 34 skyandtelescope.org FORENSIC ASTRONOMY: Fishing the Pisces Cloud Wander Through Winter's Splendors Page 58 Page 62 Page 26 GOING DEEP: How Science Saved an Innocent Manhttp://www.skyandtelescope.org