Advertisers in This Issue Astronomy equipment manufacturers and dealers are a valuable resource for amateur and professional astronomers alike. Patronize our advertisers in this issue and enjoy all the benefits of their expertise. Product Locator Airy-Disk »page 71 telescopes / lenses / mirrors airy-disk.com Astro-Physics »page 81 mounts / telescopes astro-physics.com Celestron »back cover accessories / binoculars / mounts / telescopes celestron.com Diffraction Limited »page 71 cameras diffractionlimited.com Insight Cruises »page 3 group cruise travel specialist insightcruises.com QHYCCD »page 1 cameras qhyccd.com Sky-Watcher »inside front cover binoculars / mounts / telescopes skywatcherusa.com Stellarvue »inside back cover eyepieces / telescopes stellarvue.com Ad Index Airy-Disk ................................................. 71 ALPO ....................................................... 81 American Astronomical Society ................ 59 Astro-Physics .......................................... 81 Bob's Knobs ............................................. 80 Casitas de Gila Guesthouses .................... 80 Celestron ................................................. C4 DarkSky International .............................. 81 Diffraction Limited ................................... 71 Insight Cruises ........................................... 3 Knightware .............................................. 81 Lunatico Astronomia ................................ 80 Magnificent Aurora Book .......................... 73 Nine Planets Ring .................................... 81 Precise Parts ........................................... 80 QHYCCD .................................................... 1 ScopeTrader ............................................ 80 Sky & Telescope ...................3, 5, 71, 73, 83 Sky-Watcher ............................................ C2 Stellarvue ................................................ C3 Texas Star Party ....................................... 80 William Optics .......................................... 80 Willmann-Bell Books ................................ 81 To advertise in our Product Locator, please email Rod Nenner at: ads@skyandtelescope.org 82 JANUARY 2025 * SKY & TELESCOPEhttp://www.airy-disk.com http://www.insightcruises.com http://www.astro-physics.com http://www.qhyccd.com http://www.celestron.com http://www.skywatcherusa.com http://www.diffractionlimited.com http://www.stellarvue.com