CENTAURS: Comets in the Making PAGE 14 SCAVENGER HUNT: A Winter-Sky Challenge PAGE 20 COSMIC STRUCTURE: The Threads Between Galaxies PAGE 34 THE E S SENTIAL GUIDE TO ASTRONOMY JANUARY 2022 Sharpen Your Nightscapes A Guide to Buying Lenses Page 28 skyandtelescope.org Catch Four Planets at Dusk Page 46 Which Deep-Sky Atlas Came First? Page 58http://www.skyandtelescope.org