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 59 telescopes / lenses / mirrors airy-disk.com Archeological Paths »back cover archeology lecture tour zahilectures.com Astro-Physics »page 81 mounts / telescopes astro-physics.com Diffraction Limited »page 59 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 Snow King Observatory and Planetarium »page 73 stargazing at a ski resort skobservatory.com Stellarvue »inside back cover eyepieces / telescopes stellarvue.com Ad Index Airy-Disk ................................................. 59 ALPO ....................................................... 81 Archeological Paths ................................. C4 AstroCon.................................................. 81 Astro-Physics .......................................... 81 Bob's Knobs............................................. 80 Casitas de Gila Guesthouses .................... 80 Chiricahua Sky Village.............................. 80 DarkSky International .............................. 81 Diffraction Limited ................................... 59 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, 59, 73, 75, 83 Sky-Watcher............................................ C2 Snow King Observatory............................ 73 Stellarvue ................................................ C3 William Optics.......................................... 80 Willmann-Bell Books................................ 81 To advertise in our Product Locator, please email Rod Nenner at: ads@skyandtelescope.org 82 MARCH 2025 * SKY & TELESCOPEhttp://www.airy-disk.com http://www.qhyccd.com http://www.zahilectures.com http://www.skywatcherusa.com http://www.astro-physics.com http://www.skobservatory.com http://www.diffractionlimited.com http://www.stellarvue.com http://www.insightcruises.com